256815780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:131

約数の個数: 288

約数和(自身を含む): 865751040

約数和(自身を除く): 608935260

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 19, 20, 26, 30, 31, 38, 39, 43, 52, 57, 60, 62, 65, 76, 78, 86, 93, 95, 114, 124, 129, 130, 155, 156, 169, 172, 186, 190, 195, 215, 228, 247, 258, 260, 285, 310, 338, 372, 380, 390, 403, 430, 465, 494, 507, 516, 559, 570, 589, 620, 645, 676, 741, 780, 806, 817, 845, 860, 930, 988, 1014, 1118, 1140, 1178, 1209, 1235, 1290, 1333, 1482, 1612, 1634, 1677, 1690, 1767, 1860, 2015, 2028, 2236, 2356, 2418, 2451, 2470, 2535, 2580, 2666, 2795, 2945, 2964, 3211, 3268, 3354, 3380, 3534, 3705, 3999, 4030, 4085, 4836, 4902, 4940, 5070, 5239, 5332, 5590, 5890, 6045, 6422, 6665, 6708, 7068, 7267, 7410, 7657, 7998, 8060, 8170, 8385, 8835, 9633, 9804, 10140, 10478, 10621, 11180, 11780, 12090, 12255, 12844, 13330, 14534, 14820, 15314, 15717, 15996, 16055, 16340, 16770, 17329, 17670, 19266, 19995, 20956, 21242, 21801, 22971, 24180, 24510, 25327, 26195, 26660, 29068, 30628, 31434, 31863, 32110, 33540, 34658, 35340, 36335, 38285, 38532, 39990, 42484, 43602, 45942, 48165, 49020, 50654, 51987, 52390, 53105, 62868, 63726, 64220, 69316, 72670, 75981, 76570, 78585, 79980, 86645, 87204, 91884, 96330, 99541, 101308, 103974, 104780, 106210, 109005, 114855, 126635, 127452, 138073, 145340, 151962, 153140, 157170, 159315, 173290, 192660, 199082, 207948, 212420, 218010, 225277, 229710, 253270, 259935, 276146, 298623, 303924, 314340, 318630, 329251, 346580, 379905, 398164, 414219, 436020, 450554, 459420, 497705, 506540, 519870, 552292, 597246, 637260, 658502, 675831, 690365, 759810, 828438, 901108, 987753, 995410, 1039740, 1126385, 1194492, 1317004, 1351662, 1380730, 1493115, 1519620, 1646255, 1656876, 1975506, 1990820, 2071095, 2252770, 2703324, 2761460, 2986230, 3292510, 3379155, 3951012, 4142190, 4280263, 4505540, 4938765, 5972460, 6585020, 6758310, 8284380, 8560526, 9877530, 12840789, 13516620, 17121052, 19755060, 21401315, 25681578, 42802630, 51363156, 64203945, 85605260, 128407890, 256815780]

約数ペア:

[(1, 256815780), (2, 128407890), (3, 85605260), (4, 64203945), (5, 51363156), (6, 42802630), (10, 25681578), (12, 21401315), (13, 19755060), (15, 17121052), (19, 13516620), (20, 12840789), (26, 9877530), (30, 8560526), (31, 8284380), (38, 6758310), (39, 6585020), (43, 5972460), (52, 4938765), (57, 4505540), (60, 4280263), (62, 4142190), (65, 3951012), (76, 3379155), (78, 3292510), (86, 2986230), (93, 2761460), (95, 2703324), (114, 2252770), (124, 2071095), (129, 1990820), (130, 1975506), (155, 1656876), (156, 1646255), (169, 1519620), (172, 1493115), (186, 1380730), (190, 1351662), (195, 1317004), (215, 1194492), (228, 1126385), (247, 1039740), (258, 995410), (260, 987753), (285, 901108), (310, 828438), (338, 759810), (372, 690365), (380, 675831), (390, 658502), (403, 637260), (430, 597246), (465, 552292), (494, 519870), (507, 506540), (516, 497705), (559, 459420), (570, 450554), (589, 436020), (620, 414219), (645, 398164), (676, 379905), (741, 346580), (780, 329251), (806, 318630), (817, 314340), (845, 303924), (860, 298623), (930, 276146), (988, 259935), (1014, 253270), (1118, 229710), (1140, 225277), (1178, 218010), (1209, 212420), (1235, 207948), (1290, 199082), (1333, 192660), (1482, 173290), (1612, 159315), (1634, 157170), (1677, 153140), (1690, 151962), (1767, 145340), (1860, 138073), (2015, 127452), (2028, 126635), (2236, 114855), (2356, 109005), (2418, 106210), (2451, 104780), (2470, 103974), (2535, 101308), (2580, 99541), (2666, 96330), (2795, 91884), (2945, 87204), (2964, 86645), (3211, 79980), (3268, 78585), (3354, 76570), (3380, 75981), (3534, 72670), (3705, 69316), (3999, 64220), (4030, 63726), (4085, 62868), (4836, 53105), (4902, 52390), (4940, 51987), (5070, 50654), (5239, 49020), (5332, 48165), (5590, 45942), (5890, 43602), (6045, 42484), (6422, 39990), (6665, 38532), (6708, 38285), (7068, 36335), (7267, 35340), (7410, 34658), (7657, 33540), (7998, 32110), (8060, 31863), (8170, 31434), (8385, 30628), (8835, 29068), (9633, 26660), (9804, 26195), (10140, 25327), (10478, 24510), (10621, 24180), (11180, 22971), (11780, 21801), (12090, 21242), (12255, 20956), (12844, 19995), (13330, 19266), (14534, 17670), (14820, 17329), (15314, 16770), (15717, 16340), (15996, 16055)]