640984

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{4217}}^1$

素因数の和:4242

約数の個数: 16

約数和(自身を含む): 1265400

約数和(自身を除く): 624416

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 4217, 8434, 16868, 33736, 80123, 160246, 320492, 640984]

約数ペア:

[(1, 640984), (2, 320492), (4, 160246), (8, 80123), (19, 33736), (38, 16868), (76, 8434), (152, 4217)]