21008617

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{3331}}^1$

素因数の和:3408

約数の個数: 16

約数和(自身を含む): 25909632

約数和(自身を除く): 4901015

約数列:

[1, 7, 17, 53, 119, 371, 901, 3331, 6307, 23317, 56627, 176543, 396389, 1235801, 3001231, 21008617]

約数ペア:

[(1, 21008617), (7, 3001231), (17, 1235801), (53, 396389), (119, 176543), (371, 56627), (901, 23317), (3331, 6307)]