64907980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{41081}}^1$

素因数の和:41169

約数の個数: 24

約数和(自身を含む): 138035520

約数和(自身を除く): 73127540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 41081, 82162, 164324, 205405, 410810, 821620, 3245399, 6490798, 12981596, 16226995, 32453990, 64907980]

約数ペア:

[(1, 64907980), (2, 32453990), (4, 16226995), (5, 12981596), (10, 6490798), (20, 3245399), (79, 821620), (158, 410810), (316, 205405), (395, 164324), (790, 82162), (1580, 41081)]