81186920

素因数分解:

$2^3\times 5^1\times {\mathrm{787}}^1\times {\mathrm{2579}}^1$

素因数の和:3377

約数の個数: 32

約数和(自身を含む): 182973600

約数和(自身を除く): 101786680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 787, 1574, 2579, 3148, 3935, 5158, 6296, 7870, 10316, 12895, 15740, 20632, 25790, 31480, 51580, 103160, 2029673, 4059346, 8118692, 10148365, 16237384, 20296730, 40593460, 81186920]

約数ペア:

[(1, 81186920), (2, 40593460), (4, 20296730), (5, 16237384), (8, 10148365), (10, 8118692), (20, 4059346), (40, 2029673), (787, 103160), (1574, 51580), (2579, 31480), (3148, 25790), (3935, 20632), (5158, 15740), (6296, 12895), (7870, 10316)]