20901820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13229}}^1$

素因数の和:13317

約数の個数: 24

約数和(自身を含む): 44452800

約数和(自身を除く): 23550980

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13229, 26458, 52916, 66145, 132290, 264580, 1045091, 2090182, 4180364, 5225455, 10450910, 20901820]

約数ペア:

[(1, 20901820), (2, 10450910), (4, 5225455), (5, 4180364), (10, 2090182), (20, 1045091), (79, 264580), (158, 132290), (316, 66145), (395, 52916), (790, 26458), (1580, 13229)]