21091007

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{347}}^1\times {\mathrm{457}}^1$

素因数の和:830

約数の個数: 16

約数和(自身を含む): 25501440

約数和(自身を除く): 4410433

約数列:

[1, 7, 19, 133, 347, 457, 2429, 3199, 6593, 8683, 46151, 60781, 158579, 1110053, 3013001, 21091007]

約数ペア:

[(1, 21091007), (7, 3013001), (19, 1110053), (133, 158579), (347, 60781), (457, 46151), (2429, 8683), (3199, 6593)]