64320280

素因数分解:

$2^3\times 5^1\times {\mathrm{1608007}}^1$

素因数の和:1608018

約数の個数: 16

約数和(自身を含む): 144720720

約数和(自身を除く): 80400440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1608007, 3216014, 6432028, 8040035, 12864056, 16080070, 32160140, 64320280]

約数ペア:

[(1, 64320280), (2, 32160140), (4, 16080070), (5, 12864056), (8, 8040035), (10, 6432028), (20, 3216014), (40, 1608007)]