21107925

素因数分解:

$3^3\times 5^2\times {\mathrm{31271}}^1$

素因数の和:31290

約数の個数: 24

約数和(自身を含む): 38777280

約数和(自身を除く): 17669355

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 225, 675, 31271, 93813, 156355, 281439, 469065, 781775, 844317, 1407195, 2345325, 4221585, 7035975, 21107925]

約数ペア:

[(1, 21107925), (3, 7035975), (5, 4221585), (9, 2345325), (15, 1407195), (25, 844317), (27, 781775), (45, 469065), (75, 281439), (135, 156355), (225, 93813), (675, 31271)]