1815208720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:202

約数の個数: 240

約数和(自身を含む): 4862260224

約数和(自身を除く): 3047051504

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 61, 62, 65, 71, 80, 104, 122, 124, 130, 142, 155, 169, 208, 244, 248, 260, 284, 305, 310, 338, 355, 403, 488, 496, 520, 568, 610, 620, 676, 710, 793, 806, 845, 923, 976, 1040, 1136, 1220, 1240, 1352, 1420, 1586, 1612, 1690, 1846, 1891, 2015, 2201, 2440, 2480, 2704, 2840, 3172, 3224, 3380, 3692, 3782, 3965, 4030, 4331, 4402, 4615, 4880, 5239, 5680, 6344, 6448, 6760, 7384, 7564, 7930, 8060, 8662, 8804, 9230, 9455, 10309, 10478, 11005, 11999, 12688, 13520, 14768, 15128, 15860, 16120, 17324, 17608, 18460, 18910, 20618, 20956, 21655, 22010, 23998, 24583, 26195, 28613, 30256, 31720, 32240, 34648, 35216, 36920, 37820, 41236, 41912, 43310, 44020, 47996, 49166, 51545, 52390, 56303, 57226, 59995, 63440, 69296, 73840, 75640, 82472, 83824, 86620, 88040, 95992, 98332, 103090, 104780, 112606, 114452, 119990, 122915, 134261, 143065, 151280, 164944, 173240, 176080, 191984, 196664, 206180, 209560, 225212, 228904, 239980, 245830, 268522, 281515, 286130, 319579, 346480, 371969, 393328, 412360, 419120, 450424, 457808, 479960, 491660, 537044, 563030, 572260, 639158, 671305, 731939, 743938, 824720, 900848, 959920, 983320, 1074088, 1126060, 1144520, 1278316, 1342610, 1463878, 1487876, 1597895, 1745393, 1859845, 1966640, 2148176, 2252120, 2289040, 2556632, 2685220, 2927756, 2975752, 3195790, 3490786, 3659695, 3719690, 4504240, 5113264, 5370440, 5855512, 5951504, 6391580, 6981572, 7319390, 7439380, 8726965, 10740880, 11711024, 12783160, 13963144, 14638780, 14878760, 17453930, 22690109, 25566320, 27926288, 29277560, 29757520, 34907860, 45380218, 58555120, 69815720, 90760436, 113450545, 139631440, 181520872, 226901090, 363041744, 453802180, 907604360, 1815208720]

約数ペア:

[(1, 1815208720), (2, 907604360), (4, 453802180), (5, 363041744), (8, 226901090), (10, 181520872), (13, 139631440), (16, 113450545), (20, 90760436), (26, 69815720), (31, 58555120), (40, 45380218), (52, 34907860), (61, 29757520), (62, 29277560), (65, 27926288), (71, 25566320), (80, 22690109), (104, 17453930), (122, 14878760), (124, 14638780), (130, 13963144), (142, 12783160), (155, 11711024), (169, 10740880), (208, 8726965), (244, 7439380), (248, 7319390), (260, 6981572), (284, 6391580), (305, 5951504), (310, 5855512), (338, 5370440), (355, 5113264), (403, 4504240), (488, 3719690), (496, 3659695), (520, 3490786), (568, 3195790), (610, 2975752), (620, 2927756), (676, 2685220), (710, 2556632), (793, 2289040), (806, 2252120), (845, 2148176), (923, 1966640), (976, 1859845), (1040, 1745393), (1136, 1597895), (1220, 1487876), (1240, 1463878), (1352, 1342610), (1420, 1278316), (1586, 1144520), (1612, 1126060), (1690, 1074088), (1846, 983320), (1891, 959920), (2015, 900848), (2201, 824720), (2440, 743938), (2480, 731939), (2704, 671305), (2840, 639158), (3172, 572260), (3224, 563030), (3380, 537044), (3692, 491660), (3782, 479960), (3965, 457808), (4030, 450424), (4331, 419120), (4402, 412360), (4615, 393328), (4880, 371969), (5239, 346480), (5680, 319579), (6344, 286130), (6448, 281515), (6760, 268522), (7384, 245830), (7564, 239980), (7930, 228904), (8060, 225212), (8662, 209560), (8804, 206180), (9230, 196664), (9455, 191984), (10309, 176080), (10478, 173240), (11005, 164944), (11999, 151280), (12688, 143065), (13520, 134261), (14768, 122915), (15128, 119990), (15860, 114452), (16120, 112606), (17324, 104780), (17608, 103090), (18460, 98332), (18910, 95992), (20618, 88040), (20956, 86620), (21655, 83824), (22010, 82472), (23998, 75640), (24583, 73840), (26195, 69296), (28613, 63440), (30256, 59995), (31720, 57226), (32240, 56303), (34648, 52390), (35216, 51545), (36920, 49166), (37820, 47996), (41236, 44020), (41912, 43310)]