21013587

素因数分解:

$3^4\times 7^1\times {\mathrm{37061}}^1$

素因数の和:37080

約数の個数: 20

約数和(自身を含む): 35876016

約数和(自身を除く): 14862429

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37061, 111183, 259427, 333549, 778281, 1000647, 2334843, 3001941, 7004529, 21013587]

約数ペア:

[(1, 21013587), (3, 7004529), (7, 3001941), (9, 2334843), (21, 1000647), (27, 778281), (63, 333549), (81, 259427), (189, 111183), (567, 37061)]