7997680

素因数分解:

$2^4\times 5^1\times {\mathrm{99971}}^1$

素因数の和:99984

約数の個数: 20

約数和(自身を含む): 18594792

約数和(自身を除く): 10597112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 99971, 199942, 399884, 499855, 799768, 999710, 1599536, 1999420, 3998840, 7997680]

約数ペア:

[(1, 7997680), (2, 3998840), (4, 1999420), (5, 1599536), (8, 999710), (10, 799768), (16, 499855), (20, 399884), (40, 199942), (80, 99971)]