20217155

素因数分解:

$5^1\times 7^2\times {\mathrm{179}}^1\times {\mathrm{461}}^1$

素因数の和:659

約数の個数: 24

約数和(自身を含む): 28440720

約数和(自身を除く): 8223565

約数列:

[1, 5, 7, 35, 49, 179, 245, 461, 895, 1253, 2305, 3227, 6265, 8771, 16135, 22589, 43855, 82519, 112945, 412595, 577633, 2888165, 4043431, 20217155]

約数ペア:

[(1, 20217155), (5, 4043431), (7, 2888165), (35, 577633), (49, 412595), (179, 112945), (245, 82519), (461, 43855), (895, 22589), (1253, 16135), (2305, 8771), (3227, 6265)]