3998978840

素因数分解:

$2^3\times 5^1\times {\mathrm{99974471}}^1$

素因数の和:99974482

約数の個数: 16

約数和(自身を含む): 8997702480

約数和(自身を除く): 4998723640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 99974471, 199948942, 399897884, 499872355, 799795768, 999744710, 1999489420, 3998978840]

約数ペア:

[(1, 3998978840), (2, 1999489420), (4, 999744710), (5, 799795768), (8, 499872355), (10, 399897884), (20, 199948942), (40, 99974471)]