20781326

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{107}}^1\times {\mathrm{269}}^1$

素因数の和:416

約数の個数: 24

約数和(自身を含む): 33329880

約数和(自身を除く): 12548554

約数列:

[1, 2, 19, 38, 107, 214, 269, 361, 538, 722, 2033, 4066, 5111, 10222, 28783, 38627, 57566, 77254, 97109, 194218, 546877, 1093754, 10390663, 20781326]

約数ペア:

[(1, 20781326), (2, 10390663), (19, 1093754), (38, 546877), (107, 194218), (214, 97109), (269, 77254), (361, 57566), (538, 38627), (722, 28783), (2033, 10222), (4066, 5111)]