20378757

素因数分解:

$3^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{883}}^1$

素因数の和:1057

約数の個数: 24

約数和(自身を含む): 31845216

約数和(自身を除く): 11466459

約数列:

[1, 3, 7, 21, 49, 147, 157, 471, 883, 1099, 2649, 3297, 6181, 7693, 18543, 23079, 43267, 129801, 138631, 415893, 970417, 2911251, 6792919, 20378757]

約数ペア:

[(1, 20378757), (3, 6792919), (7, 2911251), (21, 970417), (49, 415893), (147, 138631), (157, 129801), (471, 43267), (883, 23079), (1099, 18543), (2649, 7693), (3297, 6181)]