21185685

素因数分解:

$3^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1129}}^1$

素因数の和:1282

約数の個数: 32

約数和(自身を含む): 37968000

約数和(自身を除く): 16782315

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 139, 417, 695, 1129, 1251, 2085, 3387, 3753, 5645, 6255, 10161, 16935, 18765, 30483, 50805, 152415, 156931, 470793, 784655, 1412379, 2353965, 4237137, 7061895, 21185685]

約数ペア:

[(1, 21185685), (3, 7061895), (5, 4237137), (9, 2353965), (15, 1412379), (27, 784655), (45, 470793), (135, 156931), (139, 152415), (417, 50805), (695, 30483), (1129, 18765), (1251, 16935), (2085, 10161), (3387, 6255), (3753, 5645)]