20217771

素因数分解:

$3^2\times 7^1\times {\mathrm{269}}^1\times {\mathrm{1193}}^1$

素因数の和:1475

約数の個数: 24

約数和(自身を含む): 33527520

約数和(自身を除く): 13309749

約数列:

[1, 3, 7, 9, 21, 63, 269, 807, 1193, 1883, 2421, 3579, 5649, 8351, 10737, 16947, 25053, 75159, 320917, 962751, 2246419, 2888253, 6739257, 20217771]

約数ペア:

[(1, 20217771), (3, 6739257), (7, 2888253), (9, 2246419), (21, 962751), (63, 320917), (269, 75159), (807, 25053), (1193, 16947), (1883, 10737), (2421, 8351), (3579, 5649)]