21390315

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{34781}}^1$

素因数の和:34830

約数の個数: 16

約数和(自身を含む): 35060256

約数和(自身を除く): 13669941

約数列:

[1, 3, 5, 15, 41, 123, 205, 615, 34781, 104343, 173905, 521715, 1426021, 4278063, 7130105, 21390315]

約数ペア:

[(1, 21390315), (3, 7130105), (5, 4278063), (15, 1426021), (41, 521715), (123, 173905), (205, 104343), (615, 34781)]