20320251

素因数分解:

$3^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{1009}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 31778640

約数和(自身を除く): 11458389

約数列:

[1, 3, 7, 21, 49, 137, 147, 411, 959, 1009, 2877, 3027, 6713, 7063, 20139, 21189, 49441, 138233, 148323, 414699, 967631, 2902893, 6773417, 20320251]

約数ペア:

[(1, 20320251), (3, 6773417), (7, 2902893), (21, 967631), (49, 414699), (137, 148323), (147, 138233), (411, 49441), (959, 21189), (1009, 20139), (2877, 7063), (3027, 6713)]