18979516

素因数分解:

$2^2\times {\mathrm{101}}^1\times {\mathrm{109}}^1\times {\mathrm{431}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 33929280

約数和(自身を除く): 14949764

約数列:

[1, 2, 4, 101, 109, 202, 218, 404, 431, 436, 862, 1724, 11009, 22018, 43531, 44036, 46979, 87062, 93958, 174124, 187916, 4744879, 9489758, 18979516]

約数ペア:

[(1, 18979516), (2, 9489758), (4, 4744879), (101, 187916), (109, 174124), (202, 93958), (218, 87062), (404, 46979), (431, 44036), (436, 43531), (862, 22018), (1724, 11009)]