21709863

素因数分解:

$3^5\times 7^1\times {\mathrm{12763}}^1$

素因数の和:12785

約数の個数: 24

約数和(自身を含む): 37168768

約数和(自身を除く): 15458905

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12763, 38289, 89341, 114867, 268023, 344601, 804069, 1033803, 2412207, 3101409, 7236621, 21709863]

約数ペア:

[(1, 21709863), (3, 7236621), (7, 3101409), (9, 2412207), (21, 1033803), (27, 804069), (63, 344601), (81, 268023), (189, 114867), (243, 89341), (567, 38289), (1701, 12763)]