80397620

素因数分解:

$2^2\times 5^1\times {\mathrm{1993}}^1\times {\mathrm{2017}}^1$

素因数の和:4019

約数の個数: 24

約数和(自身を含む): 169003464

約数和(自身を除く): 88605844

約数列:

[1, 2, 4, 5, 10, 20, 1993, 2017, 3986, 4034, 7972, 8068, 9965, 10085, 19930, 20170, 39860, 40340, 4019881, 8039762, 16079524, 20099405, 40198810, 80397620]

約数ペア:

[(1, 80397620), (2, 40198810), (4, 20099405), (5, 16079524), (10, 8039762), (20, 4019881), (1993, 40340), (2017, 39860), (3986, 20170), (4034, 19930), (7972, 10085), (8068, 9965)]