21253964

素因数分解:

$2^2\times {\mathrm{47}}^1\times {\mathrm{131}}^1\times {\mathrm{863}}^1$

素因数の和:1045

約数の個数: 24

約数和(自身を含む): 38320128

約数和(自身を除く): 17066164

約数列:

[1, 2, 4, 47, 94, 131, 188, 262, 524, 863, 1726, 3452, 6157, 12314, 24628, 40561, 81122, 113053, 162244, 226106, 452212, 5313491, 10626982, 21253964]

約数ペア:

[(1, 21253964), (2, 10626982), (4, 5313491), (47, 452212), (94, 226106), (131, 162244), (188, 113053), (262, 81122), (524, 40561), (863, 24628), (1726, 12314), (3452, 6157)]