21737780

素因数分解:

$2^2\times 5^1\times {\mathrm{547}}^1\times {\mathrm{1987}}^1$

素因数の和:2543

約数の個数: 24

約数和(自身を含む): 45755808

約数和(自身を除く): 24018028

約数列:

[1, 2, 4, 5, 10, 20, 547, 1094, 1987, 2188, 2735, 3974, 5470, 7948, 9935, 10940, 19870, 39740, 1086889, 2173778, 4347556, 5434445, 10868890, 21737780]

約数ペア:

[(1, 21737780), (2, 10868890), (4, 5434445), (5, 4347556), (10, 2173778), (20, 1086889), (547, 39740), (1094, 19870), (1987, 10940), (2188, 9935), (2735, 7948), (3974, 5470)]