21988953

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{8117}}^1$

素因数の和:8173

約数の個数: 24

約数和(自身を含む): 37147968

約数和(自身を除く): 15159015

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 8117, 24351, 56819, 73053, 170457, 349031, 511371, 1047093, 2443217, 3141279, 7329651, 21988953]

約数ペア:

[(1, 21988953), (3, 7329651), (7, 3141279), (9, 2443217), (21, 1047093), (43, 511371), (63, 349031), (129, 170457), (301, 73053), (387, 56819), (903, 24351), (2709, 8117)]