21357385

素因数分解:

$5^1\times 7^2\times {\mathrm{179}}^1\times {\mathrm{487}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 30041280

約数和(自身を除く): 8683895

約数列:

[1, 5, 7, 35, 49, 179, 245, 487, 895, 1253, 2435, 3409, 6265, 8771, 17045, 23863, 43855, 87173, 119315, 435865, 610211, 3051055, 4271477, 21357385]

約数ペア:

[(1, 21357385), (5, 4271477), (7, 3051055), (35, 610211), (49, 435865), (179, 119315), (245, 87173), (487, 43855), (895, 23863), (1253, 17045), (2435, 8771), (3409, 6265)]