21072152

素因数分解:

$2^3\times {\mathrm{103}}^1\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 40435200

約数和(自身を除く): 19363048

約数列:

[1, 2, 4, 8, 103, 107, 206, 214, 239, 412, 428, 478, 824, 856, 956, 1912, 11021, 22042, 24617, 25573, 44084, 49234, 51146, 88168, 98468, 102292, 196936, 204584, 2634019, 5268038, 10536076, 21072152]

約数ペア:

[(1, 21072152), (2, 10536076), (4, 5268038), (8, 2634019), (103, 204584), (107, 196936), (206, 102292), (214, 98468), (239, 88168), (412, 51146), (428, 49234), (478, 44084), (824, 25573), (856, 24617), (956, 22042), (1912, 11021)]