646672

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{3109}}^1$

素因数の和:3130

約数の個数: 20

約数和(自身を含む): 1349740

約数和(自身を除く): 703068

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 3109, 6218, 12436, 24872, 40417, 49744, 80834, 161668, 323336, 646672]

約数ペア:

[(1, 646672), (2, 323336), (4, 161668), (8, 80834), (13, 49744), (16, 40417), (26, 24872), (52, 12436), (104, 6218), (208, 3109)]