20218540

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{7717}}^1$

素因数の和:7857

約数の個数: 24

約数和(自身を含む): 42788592

約数和(自身を除く): 22570052

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 7717, 15434, 30868, 38585, 77170, 154340, 1010927, 2021854, 4043708, 5054635, 10109270, 20218540]

約数ペア:

[(1, 20218540), (2, 10109270), (4, 5054635), (5, 4043708), (10, 2021854), (20, 1010927), (131, 154340), (262, 77170), (524, 38585), (655, 30868), (1310, 15434), (2620, 7717)]