31191489

素因数分解:

$3^2\times 7^2\times {\mathrm{70729}}^1$

素因数の和:70749

約数の個数: 18

約数和(自身を含む): 52410930

約数和(自身を除く): 21219441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 70729, 212187, 495103, 636561, 1485309, 3465721, 4455927, 10397163, 31191489]

約数ペア:

[(1, 31191489), (3, 10397163), (7, 4455927), (9, 3465721), (21, 1485309), (49, 636561), (63, 495103), (147, 212187), (441, 70729)]