20801725

素因数分解:

$5^2\times 7^2\times {\mathrm{16981}}^1$

素因数の和:17005

約数の個数: 18

約数和(自身を含む): 30007194

約数和(自身を除く): 9205469

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 16981, 84905, 118867, 424525, 594335, 832069, 2971675, 4160345, 20801725]

約数ペア:

[(1, 20801725), (5, 4160345), (7, 2971675), (25, 832069), (35, 594335), (49, 424525), (175, 118867), (245, 84905), (1225, 16981)]