21251805

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13241}}^1$

素因数の和:13356

約数の個数: 16

約数和(自身を含む): 34323264

約数和(自身を除く): 13071459

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 13241, 39723, 66205, 198615, 1416787, 4250361, 7083935, 21251805]

約数ペア:

[(1, 21251805), (3, 7083935), (5, 4250361), (15, 1416787), (107, 198615), (321, 66205), (535, 39723), (1605, 13241)]