64405700

素因数分解:

$2^2\times 5^2\times {\mathrm{644057}}^1$

素因数の和:644071

約数の個数: 18

約数和(自身を含む): 139760586

約数和(自身を除く): 75354886

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 644057, 1288114, 2576228, 3220285, 6440570, 12881140, 16101425, 32202850, 64405700]

約数ペア:

[(1, 64405700), (2, 32202850), (4, 16101425), (5, 12881140), (10, 6440570), (20, 3220285), (25, 2576228), (50, 1288114), (100, 644057)]