21253407

素因数分解:

$3^1\times 7^2\times {\mathrm{163}}^1\times {\mathrm{887}}^1$

素因数の和:1067

約数の個数: 24

約数和(自身を含む): 33204096

約数和(自身を除く): 11950689

約数列:

[1, 3, 7, 21, 49, 147, 163, 489, 887, 1141, 2661, 3423, 6209, 7987, 18627, 23961, 43463, 130389, 144581, 433743, 1012067, 3036201, 7084469, 21253407]

約数ペア:

[(1, 21253407), (3, 7084469), (7, 3036201), (21, 1012067), (49, 433743), (147, 144581), (163, 130389), (489, 43463), (887, 23961), (1141, 18627), (2661, 7987), (3423, 6209)]