64139380

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{7841}}^1$

素因数の和:8259

約数の個数: 24

約数和(自身を含む): 135039240

約数和(自身を除く): 70899860

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 7841, 8180, 15682, 31364, 39205, 78410, 156820, 3206969, 6413938, 12827876, 16034845, 32069690, 64139380]

約数ペア:

[(1, 64139380), (2, 32069690), (4, 16034845), (5, 12827876), (10, 6413938), (20, 3206969), (409, 156820), (818, 78410), (1636, 39205), (2045, 31364), (4090, 15682), (7841, 8180)]