21350084

素因数分解:

$2^2\times 7^2\times {\mathrm{108929}}^1$

素因数の和:108947

約数の個数: 18

約数和(自身を含む): 43463070

約数和(自身を除く): 22112986

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 108929, 217858, 435716, 762503, 1525006, 3050012, 5337521, 10675042, 21350084]

約数ペア:

[(1, 21350084), (2, 10675042), (4, 5337521), (7, 3050012), (14, 1525006), (28, 762503), (49, 435716), (98, 217858), (196, 108929)]