21390555

素因数分解:

$3^1\times 5^1\times {\mathrm{283}}^1\times {\mathrm{5039}}^1$

素因数の和:5330

約数の個数: 16

約数和(自身を含む): 34352640

約数和(自身を除く): 12962085

約数列:

[1, 3, 5, 15, 283, 849, 1415, 4245, 5039, 15117, 25195, 75585, 1426037, 4278111, 7130185, 21390555]

約数ペア:

[(1, 21390555), (3, 7130185), (5, 4278111), (15, 1426037), (283, 75585), (849, 25195), (1415, 15117), (4245, 5039)]