21352975

素因数分解:

$5^2\times 7^2\times {\mathrm{17431}}^1$

素因数の和:17455

約数の個数: 18

約数和(自身を含む): 30802344

約数和(自身を除く): 9449369

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 17431, 87155, 122017, 435775, 610085, 854119, 3050425, 4270595, 21352975]

約数ペア:

[(1, 21352975), (5, 4270595), (7, 3050425), (25, 854119), (35, 610085), (49, 435775), (175, 122017), (245, 87155), (1225, 17431)]