64404580

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{7649}}^1$

素因数の和:8079

約数の個数: 24

約数和(自身を含む): 135588600

約数和(自身を除く): 71184020

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 4210, 7649, 8420, 15298, 30596, 38245, 76490, 152980, 3220229, 6440458, 12880916, 16101145, 32202290, 64404580]

約数ペア:

[(1, 64404580), (2, 32202290), (4, 16101145), (5, 12880916), (10, 6440458), (20, 3220229), (421, 152980), (842, 76490), (1684, 38245), (2105, 30596), (4210, 15298), (7649, 8420)]