18321680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{223}}^1$

素因数の和:328

約数の個数: 80

約数和(自身を含む): 46663680

約数和(自身を除く): 28342000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 79, 80, 104, 130, 158, 208, 223, 260, 316, 395, 446, 520, 632, 790, 892, 1027, 1040, 1115, 1264, 1580, 1784, 2054, 2230, 2899, 3160, 3568, 4108, 4460, 5135, 5798, 6320, 8216, 8920, 10270, 11596, 14495, 16432, 17617, 17840, 20540, 23192, 28990, 35234, 41080, 46384, 57980, 70468, 82160, 88085, 115960, 140936, 176170, 229021, 231920, 281872, 352340, 458042, 704680, 916084, 1145105, 1409360, 1832168, 2290210, 3664336, 4580420, 9160840, 18321680]

約数ペア:

[(1, 18321680), (2, 9160840), (4, 4580420), (5, 3664336), (8, 2290210), (10, 1832168), (13, 1409360), (16, 1145105), (20, 916084), (26, 704680), (40, 458042), (52, 352340), (65, 281872), (79, 231920), (80, 229021), (104, 176170), (130, 140936), (158, 115960), (208, 88085), (223, 82160), (260, 70468), (316, 57980), (395, 46384), (446, 41080), (520, 35234), (632, 28990), (790, 23192), (892, 20540), (1027, 17840), (1040, 17617), (1115, 16432), (1264, 14495), (1580, 11596), (1784, 10270), (2054, 8920), (2230, 8216), (2899, 6320), (3160, 5798), (3568, 5135), (4108, 4460)]