20640464

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{99233}}^1$

素因数の和:99254

約数の個数: 20

約数和(自身を含む): 43067556

約数和(自身を除く): 22427092

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 99233, 198466, 396932, 793864, 1290029, 1587728, 2580058, 5160116, 10320232, 20640464]

約数ペア:

[(1, 20640464), (2, 10320232), (4, 5160116), (8, 2580058), (13, 1587728), (16, 1290029), (26, 793864), (52, 396932), (104, 198466), (208, 99233)]