81375620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131251}}^1$

素因数の和:131291

約数の個数: 24

約数和(自身を含む): 176402688

約数和(自身を除く): 95027068

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131251, 262502, 525004, 656255, 1312510, 2625020, 4068781, 8137562, 16275124, 20343905, 40687810, 81375620]

約数ペア:

[(1, 81375620), (2, 40687810), (4, 20343905), (5, 16275124), (10, 8137562), (20, 4068781), (31, 2625020), (62, 1312510), (124, 656255), (155, 525004), (310, 262502), (620, 131251)]