620877680

素因数分解:

$2^4\times 5^1\times {\mathrm{7760971}}^1$

素因数の和:7760984

約数の個数: 20

約数和(自身を含む): 1443540792

約数和(自身を除く): 822663112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 7760971, 15521942, 31043884, 38804855, 62087768, 77609710, 124175536, 155219420, 310438840, 620877680]

約数ペア:

[(1, 620877680), (2, 310438840), (4, 155219420), (5, 124175536), (8, 77609710), (10, 62087768), (16, 38804855), (20, 31043884), (40, 15521942), (80, 7760971)]