21147279

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{983}}^1$

素因数の和:1158

約数の個数: 16

約数和(自身を含む): 28905984

約数和(自身を除く): 7758705

約数列:

[1, 3, 71, 101, 213, 303, 983, 2949, 7171, 21513, 69793, 99283, 209379, 297849, 7049093, 21147279]

約数ペア:

[(1, 21147279), (3, 7049093), (71, 297849), (101, 209379), (213, 99283), (303, 69793), (983, 21513), (2949, 7171)]