21315906

素因数分解:

$2^1\times 3^3\times {\mathrm{394739}}^1$

素因数の和:394750

約数の個数: 16

約数和(自身を含む): 47368800

約数和(自身を除く): 26052894

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 394739, 789478, 1184217, 2368434, 3552651, 7105302, 10657953, 21315906]

約数ペア:

[(1, 21315906), (2, 10657953), (3, 7105302), (6, 3552651), (9, 2368434), (18, 1184217), (27, 789478), (54, 394739)]