81725680

素因数分解:

$2^4\times 5^1\times {\mathrm{1021571}}^1$

素因数の和:1021584

約数の個数: 20

約数和(自身を含む): 190012392

約数和(自身を除く): 108286712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1021571, 2043142, 4086284, 5107855, 8172568, 10215710, 16345136, 20431420, 40862840, 81725680]

約数ペア:

[(1, 81725680), (2, 40862840), (4, 20431420), (5, 16345136), (8, 10215710), (10, 8172568), (16, 5107855), (20, 4086284), (40, 2043142), (80, 1021571)]