20428664

素因数分解:

$2^3\times {\mathrm{101}}^1\times {\mathrm{131}}^1\times {\mathrm{193}}^1$

素因数の和:431

約数の個数: 32

約数和(自身を含む): 39180240

約数和(自身を除く): 18751576

約数列:

[1, 2, 4, 8, 101, 131, 193, 202, 262, 386, 404, 524, 772, 808, 1048, 1544, 13231, 19493, 25283, 26462, 38986, 50566, 52924, 77972, 101132, 105848, 155944, 202264, 2553583, 5107166, 10214332, 20428664]

約数ペア:

[(1, 20428664), (2, 10214332), (4, 5107166), (8, 2553583), (101, 202264), (131, 155944), (193, 105848), (202, 101132), (262, 77972), (386, 52924), (404, 50566), (524, 38986), (772, 26462), (808, 25283), (1048, 19493), (1544, 13231)]