20780222

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{4397}}^1$

素因数の和:4555

約数の個数: 16

約数和(自身を含む): 33248880

約数和(自身を除く): 12468658

約数列:

[1, 2, 17, 34, 139, 278, 2363, 4397, 4726, 8794, 74749, 149498, 611183, 1222366, 10390111, 20780222]

約数ペア:

[(1, 20780222), (2, 10390111), (17, 1222366), (34, 611183), (139, 149498), (278, 74749), (2363, 8794), (4397, 4726)]