17712820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{21601}}^1$

素因数の和:21651

約数の個数: 24

約数和(自身を含む): 38105928

約数和(自身を除く): 20393108

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 21601, 43202, 86404, 108005, 216010, 432020, 885641, 1771282, 3542564, 4428205, 8856410, 17712820]

約数ペア:

[(1, 17712820), (2, 8856410), (4, 4428205), (5, 3542564), (10, 1771282), (20, 885641), (41, 432020), (82, 216010), (164, 108005), (205, 86404), (410, 43202), (820, 21601)]