81075340

素因数分解:

$2^2\times 5^1\times {\mathrm{397}}^1\times {\mathrm{10211}}^1$

素因数の和:10617

約数の個数: 24

約数和(自身を含む): 170703792

約数和(自身を除く): 89628452

約数列:

[1, 2, 4, 5, 10, 20, 397, 794, 1588, 1985, 3970, 7940, 10211, 20422, 40844, 51055, 102110, 204220, 4053767, 8107534, 16215068, 20268835, 40537670, 81075340]

約数ペア:

[(1, 81075340), (2, 40537670), (4, 20268835), (5, 16215068), (10, 8107534), (20, 4053767), (397, 204220), (794, 102110), (1588, 51055), (1985, 40844), (3970, 20422), (7940, 10211)]