21630978

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{27947}}^1$

素因数の和:27998

約数の個数: 24

約数和(自身を含む): 47958768

約数和(自身を除く): 26327790

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 129, 258, 387, 774, 27947, 55894, 83841, 167682, 251523, 503046, 1201721, 2403442, 3605163, 7210326, 10815489, 21630978]

約数ペア:

[(1, 21630978), (2, 10815489), (3, 7210326), (6, 3605163), (9, 2403442), (18, 1201721), (43, 503046), (86, 251523), (129, 167682), (258, 83841), (387, 55894), (774, 27947)]