21005565

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28579}}^1$

素因数の和:28601

約数の個数: 24

約数和(自身を含む): 39097440

約数和(自身を除く): 18091875

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28579, 85737, 142895, 200053, 428685, 600159, 1000265, 1400371, 3000795, 4201113, 7001855, 21005565]

約数ペア:

[(1, 21005565), (3, 7001855), (5, 4201113), (7, 3000795), (15, 1400371), (21, 1000265), (35, 600159), (49, 428685), (105, 200053), (147, 142895), (245, 85737), (735, 28579)]