21156615

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11467}}^1$

素因数の和:11519

約数の個数: 24

約数和(自身を含む): 37569168

約数和(自身を除く): 16412553

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 11467, 34401, 57335, 103203, 172005, 470147, 516015, 1410441, 2350735, 4231323, 7052205, 21156615]

約数ペア:

[(1, 21156615), (3, 7052205), (5, 4231323), (9, 2350735), (15, 1410441), (41, 516015), (45, 470147), (123, 172005), (205, 103203), (369, 57335), (615, 34401), (1845, 11467)]