21808275

素因数分解:

$3^1\times 5^2\times {\mathrm{313}}^1\times {\mathrm{929}}^1$

素因数の和:1255

約数の個数: 24

約数和(自身を含む): 36210480

約数和(自身を除く): 14402205

約数列:

[1, 3, 5, 15, 25, 75, 313, 929, 939, 1565, 2787, 4645, 4695, 7825, 13935, 23225, 23475, 69675, 290777, 872331, 1453885, 4361655, 7269425, 21808275]

約数ペア:

[(1, 21808275), (3, 7269425), (5, 4361655), (15, 1453885), (25, 872331), (75, 290777), (313, 69675), (929, 23475), (939, 23225), (1565, 13935), (2787, 7825), (4645, 4695)]