80211640

素因数分解:

$2^3\times 5^1\times {\mathrm{719}}^1\times {\mathrm{2789}}^1$

素因数の和:3519

約数の個数: 32

約数和(自身を含む): 180792000

約数和(自身を除く): 100580360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 719, 1438, 2789, 2876, 3595, 5578, 5752, 7190, 11156, 13945, 14380, 22312, 27890, 28760, 55780, 111560, 2005291, 4010582, 8021164, 10026455, 16042328, 20052910, 40105820, 80211640]

約数ペア:

[(1, 80211640), (2, 40105820), (4, 20052910), (5, 16042328), (8, 10026455), (10, 8021164), (20, 4010582), (40, 2005291), (719, 111560), (1438, 55780), (2789, 28760), (2876, 27890), (3595, 22312), (5578, 14380), (5752, 13945), (7190, 11156)]