20905551

素因数分解:

$3^2\times {\mathrm{23}}^2\times {\mathrm{4391}}^1$

素因数の和:4443

約数の個数: 18

約数和(自身を含む): 31574088

約数和(自身を除く): 10668537

約数列:

[1, 3, 9, 23, 69, 207, 529, 1587, 4391, 4761, 13173, 39519, 100993, 302979, 908937, 2322839, 6968517, 20905551]

約数ペア:

[(1, 20905551), (3, 6968517), (9, 2322839), (23, 908937), (69, 302979), (207, 100993), (529, 39519), (1587, 13173), (4391, 4761)]