21117873

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7561}}^1$

素因数の和:7597

約数の個数: 24

約数和(自身を含む): 34482720

約数和(自身を除く): 13364847

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7561, 22683, 52927, 143659, 158781, 370489, 430977, 1005613, 1111467, 3016839, 7039291, 21117873]

約数ペア:

[(1, 21117873), (3, 7039291), (7, 3016839), (19, 1111467), (21, 1005613), (49, 430977), (57, 370489), (133, 158781), (147, 143659), (399, 52927), (931, 22683), (2793, 7561)]