20399931

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{5857}}^1$

素因数の和:5912

約数の個数: 20

約数和(自身を含む): 31187992

約数和(自身を除く): 10788061

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 5857, 17571, 52713, 158139, 251851, 474417, 755553, 2266659, 6799977, 20399931]

約数ペア:

[(1, 20399931), (3, 6799977), (9, 2266659), (27, 755553), (43, 474417), (81, 251851), (129, 158139), (387, 52713), (1161, 17571), (3483, 5857)]