21016737

素因数分解:

$3^2\times 7^2\times {\mathrm{47657}}^1$

素因数の和:47677

約数の個数: 18

約数和(自身を含む): 35314578

約数和(自身を除く): 14297841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47657, 142971, 333599, 428913, 1000797, 2335193, 3002391, 7005579, 21016737]

約数ペア:

[(1, 21016737), (3, 7005579), (7, 3002391), (9, 2335193), (21, 1000797), (49, 428913), (63, 333599), (147, 142971), (441, 47657)]