20489170

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^2$

素因数の和:814

約数の個数: 24

約数和(自身を含む): 39817764

約数和(自身を除く): 19328594

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 397, 794, 1985, 3970, 5161, 10322, 25805, 51610, 157609, 315218, 788045, 1576090, 2048917, 4097834, 10244585, 20489170]

約数ペア:

[(1, 20489170), (2, 10244585), (5, 4097834), (10, 2048917), (13, 1576090), (26, 788045), (65, 315218), (130, 157609), (397, 51610), (794, 25805), (1985, 10322), (3970, 5161)]