21755205

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11243}}^1$

素因数の和:11297

約数の個数: 24

約数和(自身を含む): 38589408

約数和(自身を除く): 16834203

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11243, 33729, 56215, 101187, 168645, 483449, 505935, 1450347, 2417245, 4351041, 7251735, 21755205]

約数ペア:

[(1, 21755205), (3, 7251735), (5, 4351041), (9, 2417245), (15, 1450347), (43, 505935), (45, 483449), (129, 168645), (215, 101187), (387, 56215), (645, 33729), (1935, 11243)]