20989906

素因数分解:

$2^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{9929}}^1$

素因数の和:10089

約数の個数: 16

約数和(自身を含む): 36224640

約数和(自身を除く): 15234734

約数列:

[1, 2, 7, 14, 151, 302, 1057, 2114, 9929, 19858, 69503, 139006, 1499279, 2998558, 10494953, 20989906]

約数ペア:

[(1, 20989906), (2, 10494953), (7, 2998558), (14, 1499279), (151, 139006), (302, 69503), (1057, 19858), (2114, 9929)]