21242745

素因数分解:

$3^2\times 5^1\times {\mathrm{547}}^1\times {\mathrm{863}}^1$

素因数の和:1421

約数の個数: 24

約数和(自身を含む): 36930816

約数和(自身を除く): 15688071

約数列:

[1, 3, 5, 9, 15, 45, 547, 863, 1641, 2589, 2735, 4315, 4923, 7767, 8205, 12945, 24615, 38835, 472061, 1416183, 2360305, 4248549, 7080915, 21242745]

約数ペア:

[(1, 21242745), (3, 7080915), (5, 4248549), (9, 2360305), (15, 1416183), (45, 472061), (547, 38835), (863, 24615), (1641, 12945), (2589, 8205), (2735, 7767), (4315, 4923)]