21000405

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{34147}}^1$

素因数の和:34196

約数の個数: 16

約数和(自身を含む): 34421184

約数和(自身を除く): 13420779

約数列:

[1, 3, 5, 15, 41, 123, 205, 615, 34147, 102441, 170735, 512205, 1400027, 4200081, 7000135, 21000405]

約数ペア:

[(1, 21000405), (3, 7000135), (5, 4200081), (15, 1400027), (41, 512205), (123, 170735), (205, 102441), (615, 34147)]