81501680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78367}}^1$

素因数の和:78393

約数の個数: 40

約数和(自身を含む): 204070272

約数和(自身を除く): 122568592

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78367, 156734, 313468, 391835, 626936, 783670, 1018771, 1253872, 1567340, 2037542, 3134680, 4075084, 5093855, 6269360, 8150168, 10187710, 16300336, 20375420, 40750840, 81501680]

約数ペア:

[(1, 81501680), (2, 40750840), (4, 20375420), (5, 16300336), (8, 10187710), (10, 8150168), (13, 6269360), (16, 5093855), (20, 4075084), (26, 3134680), (40, 2037542), (52, 1567340), (65, 1253872), (80, 1018771), (104, 783670), (130, 626936), (208, 391835), (260, 313468), (520, 156734), (1040, 78367)]