81721640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{157}}^1$

素因数の和:212

約数の個数: 192

約数和(自身を含む): 249816960

約数和(自身を除く): 168095320

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 35, 40, 44, 52, 55, 56, 65, 70, 77, 88, 91, 104, 110, 130, 140, 143, 154, 157, 169, 182, 220, 260, 280, 286, 308, 314, 338, 364, 385, 440, 455, 520, 572, 616, 628, 676, 715, 728, 770, 785, 845, 910, 1001, 1099, 1144, 1183, 1256, 1352, 1430, 1540, 1570, 1690, 1727, 1820, 1859, 2002, 2041, 2198, 2366, 2860, 3080, 3140, 3380, 3454, 3640, 3718, 4004, 4082, 4396, 4732, 5005, 5495, 5720, 5915, 6280, 6760, 6908, 7436, 8008, 8164, 8635, 8792, 9295, 9464, 10010, 10205, 10990, 11830, 12089, 13013, 13816, 14287, 14872, 16328, 17270, 18590, 20020, 20410, 21980, 22451, 23660, 24178, 26026, 26533, 28574, 34540, 37180, 40040, 40820, 43960, 44902, 47320, 48356, 52052, 53066, 57148, 60445, 65065, 69080, 71435, 74360, 81640, 89804, 96712, 104104, 106132, 112255, 114296, 120890, 130130, 132665, 142870, 157157, 179608, 185731, 212264, 224510, 241780, 260260, 265330, 285740, 291863, 314314, 371462, 449020, 483560, 520520, 530660, 571480, 583726, 628628, 742924, 785785, 898040, 928655, 1061320, 1167452, 1257256, 1459315, 1485848, 1571570, 1857310, 2043041, 2334904, 2918630, 3143140, 3714620, 4086082, 5837260, 6286280, 7429240, 8172164, 10215205, 11674520, 16344328, 20430410, 40860820, 81721640]

約数ペア:

[(1, 81721640), (2, 40860820), (4, 20430410), (5, 16344328), (7, 11674520), (8, 10215205), (10, 8172164), (11, 7429240), (13, 6286280), (14, 5837260), (20, 4086082), (22, 3714620), (26, 3143140), (28, 2918630), (35, 2334904), (40, 2043041), (44, 1857310), (52, 1571570), (55, 1485848), (56, 1459315), (65, 1257256), (70, 1167452), (77, 1061320), (88, 928655), (91, 898040), (104, 785785), (110, 742924), (130, 628628), (140, 583726), (143, 571480), (154, 530660), (157, 520520), (169, 483560), (182, 449020), (220, 371462), (260, 314314), (280, 291863), (286, 285740), (308, 265330), (314, 260260), (338, 241780), (364, 224510), (385, 212264), (440, 185731), (455, 179608), (520, 157157), (572, 142870), (616, 132665), (628, 130130), (676, 120890), (715, 114296), (728, 112255), (770, 106132), (785, 104104), (845, 96712), (910, 89804), (1001, 81640), (1099, 74360), (1144, 71435), (1183, 69080), (1256, 65065), (1352, 60445), (1430, 57148), (1540, 53066), (1570, 52052), (1690, 48356), (1727, 47320), (1820, 44902), (1859, 43960), (2002, 40820), (2041, 40040), (2198, 37180), (2366, 34540), (2860, 28574), (3080, 26533), (3140, 26026), (3380, 24178), (3454, 23660), (3640, 22451), (3718, 21980), (4004, 20410), (4082, 20020), (4396, 18590), (4732, 17270), (5005, 16328), (5495, 14872), (5720, 14287), (5915, 13816), (6280, 13013), (6760, 12089), (6908, 11830), (7436, 10990), (8008, 10205), (8164, 10010), (8635, 9464), (8792, 9295)]