21723795

素因数分解:

$3^4\times 5^1\times {\mathrm{53639}}^1$

素因数の和:53656

約数の個数: 20

約数和(自身を含む): 38942640

約数和(自身を除く): 17218845

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53639, 160917, 268195, 482751, 804585, 1448253, 2413755, 4344759, 7241265, 21723795]

約数ペア:

[(1, 21723795), (3, 7241265), (5, 4344759), (9, 2413755), (15, 1448253), (27, 804585), (45, 482751), (81, 268195), (135, 160917), (405, 53639)]