21970390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{169003}}^1$

素因数の和:169023

約数の個数: 16

約数和(自身を含む): 42589008

約数和(自身を除く): 20618618

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169003, 338006, 845015, 1690030, 2197039, 4394078, 10985195, 21970390]

約数ペア:

[(1, 21970390), (2, 10985195), (5, 4394078), (10, 2197039), (13, 1690030), (26, 845015), (65, 338006), (130, 169003)]