64890620

素因数分解:

$2^2\times 5^1\times {\mathrm{1489}}^1\times {\mathrm{2179}}^1$

素因数の和:3677

約数の個数: 24

約数和(自身を含む): 136424400

約数和(自身を除く): 71533780

約数列:

[1, 2, 4, 5, 10, 20, 1489, 2179, 2978, 4358, 5956, 7445, 8716, 10895, 14890, 21790, 29780, 43580, 3244531, 6489062, 12978124, 16222655, 32445310, 64890620]

約数ペア:

[(1, 64890620), (2, 32445310), (4, 16222655), (5, 12978124), (10, 6489062), (20, 3244531), (1489, 43580), (2179, 29780), (2978, 21790), (4358, 14890), (5956, 10895), (7445, 8716)]