81348280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{2143}}^1$

素因数の和:2240

約数の個数: 64

約数和(自身を含む): 199906560

約数和(自身を除く): 118558280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 73, 104, 130, 146, 260, 292, 365, 520, 584, 730, 949, 1460, 1898, 2143, 2920, 3796, 4286, 4745, 7592, 8572, 9490, 10715, 17144, 18980, 21430, 27859, 37960, 42860, 55718, 85720, 111436, 139295, 156439, 222872, 278590, 312878, 557180, 625756, 782195, 1114360, 1251512, 1564390, 2033707, 3128780, 4067414, 6257560, 8134828, 10168535, 16269656, 20337070, 40674140, 81348280]

約数ペア:

[(1, 81348280), (2, 40674140), (4, 20337070), (5, 16269656), (8, 10168535), (10, 8134828), (13, 6257560), (20, 4067414), (26, 3128780), (40, 2033707), (52, 1564390), (65, 1251512), (73, 1114360), (104, 782195), (130, 625756), (146, 557180), (260, 312878), (292, 278590), (365, 222872), (520, 156439), (584, 139295), (730, 111436), (949, 85720), (1460, 55718), (1898, 42860), (2143, 37960), (2920, 27859), (3796, 21430), (4286, 18980), (4745, 17144), (7592, 10715), (8572, 9490)]