64967620

素因数分解:

$2^2\times 5^1\times {\mathrm{823}}^1\times {\mathrm{3947}}^1$

素因数の和:4779

約数の個数: 24

約数和(自身を含む): 136632384

約数和(自身を除く): 71664764

約数列:

[1, 2, 4, 5, 10, 20, 823, 1646, 3292, 3947, 4115, 7894, 8230, 15788, 16460, 19735, 39470, 78940, 3248381, 6496762, 12993524, 16241905, 32483810, 64967620]

約数ペア:

[(1, 64967620), (2, 32483810), (4, 16241905), (5, 12993524), (10, 6496762), (20, 3248381), (823, 78940), (1646, 39470), (3292, 19735), (3947, 16460), (4115, 15788), (7894, 8230)]