21180789

素因数分解:

$3^2\times 7^2\times {\mathrm{48029}}^1$

素因数の和:48049

約数の個数: 18

約数和(自身を含む): 35590230

約数和(自身を除く): 14409441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 48029, 144087, 336203, 432261, 1008609, 2353421, 3025827, 7060263, 21180789]

約数ペア:

[(1, 21180789), (3, 7060263), (7, 3025827), (9, 2353421), (21, 1008609), (49, 432261), (63, 336203), (147, 144087), (441, 48029)]