64841240

素因数分解:

$2^3\times 5^1\times {\mathrm{1621031}}^1$

素因数の和:1621042

約数の個数: 16

約数和(自身を含む): 145892880

約数和(自身を除く): 81051640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1621031, 3242062, 6484124, 8105155, 12968248, 16210310, 32420620, 64841240]

約数ペア:

[(1, 64841240), (2, 32420620), (4, 16210310), (5, 12968248), (8, 8105155), (10, 6484124), (20, 3242062), (40, 1621031)]