18968289

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 27878400

約数和(自身を除く): 8910111

約数列:

[1, 3, 19, 43, 57, 71, 109, 129, 213, 327, 817, 1349, 2071, 2451, 3053, 4047, 4687, 6213, 7739, 9159, 14061, 23217, 58007, 89053, 147041, 174021, 267159, 332777, 441123, 998331, 6322763, 18968289]

約数ペア:

[(1, 18968289), (3, 6322763), (19, 998331), (43, 441123), (57, 332777), (71, 267159), (109, 174021), (129, 147041), (213, 89053), (327, 58007), (817, 23217), (1349, 14061), (2071, 9159), (2451, 7739), (3053, 6213), (4047, 4687)]