20897919

素因数分解:

$3^4\times 7^1\times {\mathrm{36857}}^1$

素因数の和:36876

約数の個数: 20

約数和(自身を含む): 35678544

約数和(自身を除く): 14780625

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 36857, 110571, 257999, 331713, 773997, 995139, 2321991, 2985417, 6965973, 20897919]

約数ペア:

[(1, 20897919), (3, 6965973), (7, 2985417), (9, 2321991), (21, 995139), (27, 773997), (63, 331713), (81, 257999), (189, 110571), (567, 36857)]