20813121

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{10657}}^1$

素因数の和:10701

約数の個数: 24

約数和(自身を含む): 35469824

約数和(自身を除く): 14656703

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 10657, 31971, 74599, 95913, 223797, 330367, 671391, 991101, 2312569, 2973303, 6937707, 20813121]

約数ペア:

[(1, 20813121), (3, 6937707), (7, 2973303), (9, 2312569), (21, 991101), (31, 671391), (63, 330367), (93, 223797), (217, 95913), (279, 74599), (651, 31971), (1953, 10657)]