21789873

素因数分解:

$3^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2203}}^1$

素因数の和:2373

約数の個数: 24

約数和(自身を含む): 36216128

約数和(自身を除く): 14426255

約数列:

[1, 3, 7, 9, 21, 63, 157, 471, 1099, 1413, 2203, 3297, 6609, 9891, 15421, 19827, 46263, 138789, 345871, 1037613, 2421097, 3112839, 7263291, 21789873]

約数ペア:

[(1, 21789873), (3, 7263291), (7, 3112839), (9, 2421097), (21, 1037613), (63, 345871), (157, 138789), (471, 46263), (1099, 19827), (1413, 15421), (2203, 9891), (3297, 6609)]