21764281

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{271}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 27907200

約数和(自身を除く): 6142919

約数列:

[1, 7, 11, 49, 77, 149, 271, 539, 1043, 1639, 1897, 2981, 7301, 11473, 13279, 20867, 40379, 80311, 146069, 282653, 444169, 1978571, 3109183, 21764281]

約数ペア:

[(1, 21764281), (7, 3109183), (11, 1978571), (49, 444169), (77, 282653), (149, 146069), (271, 80311), (539, 40379), (1043, 20867), (1639, 13279), (1897, 11473), (2981, 7301)]