656891120

素因数分解:

$2^4\times 5^1\times {\mathrm{8211139}}^1$

素因数の和:8211152

約数の個数: 20

約数和(自身を含む): 1527272040

約数和(自身を除く): 870380920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8211139, 16422278, 32844556, 41055695, 65689112, 82111390, 131378224, 164222780, 328445560, 656891120]

約数ペア:

[(1, 656891120), (2, 328445560), (4, 164222780), (5, 131378224), (8, 82111390), (10, 65689112), (16, 41055695), (20, 32844556), (40, 16422278), (80, 8211139)]