21817755

素因数分解:

$3^5\times 5^1\times {\mathrm{17957}}^1$

素因数の和:17977

約数の個数: 24

約数和(自身を含む): 39220272

約数和(自身を除く): 17402517

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17957, 53871, 89785, 161613, 269355, 484839, 808065, 1454517, 2424195, 4363551, 7272585, 21817755]

約数ペア:

[(1, 21817755), (3, 7272585), (5, 4363551), (9, 2424195), (15, 1454517), (27, 808065), (45, 484839), (81, 269355), (135, 161613), (243, 89785), (405, 53871), (1215, 17957)]