18945801

素因数分解:

$3^2\times 7^2\times {\mathrm{42961}}^1$

素因数の和:42981

約数の個数: 18

約数和(自身を含む): 31834842

約数和(自身を除く): 12889041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 42961, 128883, 300727, 386649, 902181, 2105089, 2706543, 6315267, 18945801]

約数ペア:

[(1, 18945801), (3, 6315267), (7, 2706543), (9, 2105089), (21, 902181), (49, 386649), (63, 300727), (147, 128883), (441, 42961)]