20728450

素因数分解:

$2^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{5839}}^1$

素因数の和:5922

約数の個数: 24

約数和(自身を含む): 39104640

約数和(自身を除く): 18376190

約数列:

[1, 2, 5, 10, 25, 50, 71, 142, 355, 710, 1775, 3550, 5839, 11678, 29195, 58390, 145975, 291950, 414569, 829138, 2072845, 4145690, 10364225, 20728450]

約数ペア:

[(1, 20728450), (2, 10364225), (5, 4145690), (10, 2072845), (25, 829138), (50, 414569), (71, 291950), (142, 145975), (355, 58390), (710, 29195), (1775, 11678), (3550, 5839)]