20400807

素因数分解:

$3^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{1013}}^1$

素因数の和:1167

約数の個数: 24

約数和(自身を含む): 31904496

約数和(自身を除く): 11503689

約数列:

[1, 3, 7, 21, 49, 137, 147, 411, 959, 1013, 2877, 3039, 6713, 7091, 20139, 21273, 49637, 138781, 148911, 416343, 971467, 2914401, 6800269, 20400807]

約数ペア:

[(1, 20400807), (3, 6800269), (7, 2914401), (21, 971467), (49, 416343), (137, 148911), (147, 138781), (411, 49637), (959, 21273), (1013, 20139), (2877, 7091), (3039, 6713)]