21075831

素因数分解:

$3^2\times 7^2\times {\mathrm{47791}}^1$

素因数の和:47811

約数の個数: 18

約数和(自身を含む): 35413872

約数和(自身を除く): 14338041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47791, 143373, 334537, 430119, 1003611, 2341759, 3010833, 7025277, 21075831]

約数ペア:

[(1, 21075831), (3, 7025277), (7, 3010833), (9, 2341759), (21, 1003611), (49, 430119), (63, 334537), (147, 143373), (441, 47791)]