21208415

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{827}}^1$

素因数の和:1078

約数の個数: 16

約数和(自身を含む): 26707968

約数和(自身を除く): 5499553

約数列:

[1, 5, 23, 115, 223, 827, 1115, 4135, 5129, 19021, 25645, 95105, 184421, 922105, 4241683, 21208415]

約数ペア:

[(1, 21208415), (5, 4241683), (23, 922105), (115, 184421), (223, 95105), (827, 25645), (1115, 19021), (4135, 5129)]