20754890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12281}}^1$

素因数の和:12314

約数の個数: 24

約数和(自身を含む): 40456908

約数和(自身を除く): 19702018

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12281, 24562, 61405, 122810, 159653, 319306, 798265, 1596530, 2075489, 4150978, 10377445, 20754890]

約数ペア:

[(1, 20754890), (2, 10377445), (5, 4150978), (10, 2075489), (13, 1596530), (26, 798265), (65, 319306), (130, 159653), (169, 122810), (338, 61405), (845, 24562), (1690, 12281)]