80878940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{56957}}^1$

素因数の和:57037

約数の個数: 24

約数和(自身を含む): 172240992

約数和(自身を除く): 91362052

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 56957, 113914, 227828, 284785, 569570, 1139140, 4043947, 8087894, 16175788, 20219735, 40439470, 80878940]

約数ペア:

[(1, 80878940), (2, 40439470), (4, 20219735), (5, 16175788), (10, 8087894), (20, 4043947), (71, 1139140), (142, 569570), (284, 284785), (355, 227828), (710, 113914), (1420, 56957)]