19890031

素因数分解:

$7^2\times {\mathrm{101}}^1\times {\mathrm{4019}}^1$

素因数の和:4134

約数の個数: 12

約数和(自身を含む): 23372280

約数和(自身を除く): 3482249

約数列:

[1, 7, 49, 101, 707, 4019, 4949, 28133, 196931, 405919, 2841433, 19890031]

約数ペア:

[(1, 19890031), (7, 2841433), (49, 405919), (101, 196931), (707, 28133), (4019, 4949)]