21052905

素因数分解:

$3^1\times 5^1\times {\mathrm{743}}^1\times {\mathrm{1889}}^1$

素因数の和:2640

約数の個数: 16

約数和(自身を含む): 33747840

約数和(自身を除く): 12694935

約数列:

[1, 3, 5, 15, 743, 1889, 2229, 3715, 5667, 9445, 11145, 28335, 1403527, 4210581, 7017635, 21052905]

約数ペア:

[(1, 21052905), (3, 7017635), (5, 4210581), (15, 1403527), (743, 28335), (1889, 11145), (2229, 9445), (3715, 5667)]