21082340

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{19889}}^1$

素因数の和:19951

約数の個数: 24

約数和(自身を含む): 45110520

約数和(自身を除く): 24028180

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 19889, 39778, 79556, 99445, 198890, 397780, 1054117, 2108234, 4216468, 5270585, 10541170, 21082340]

約数ペア:

[(1, 21082340), (2, 10541170), (4, 5270585), (5, 4216468), (10, 2108234), (20, 1054117), (53, 397780), (106, 198890), (212, 99445), (265, 79556), (530, 39778), (1060, 19889)]