20814857

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 25477632

約数和(自身を除く): 4662775

約数列:

[1, 7, 31, 49, 71, 193, 217, 497, 1351, 1519, 2201, 3479, 5983, 9457, 13703, 15407, 41881, 95921, 107849, 293167, 424793, 671447, 2973551, 20814857]

約数ペア:

[(1, 20814857), (7, 2973551), (31, 671447), (49, 424793), (71, 293167), (193, 107849), (217, 95921), (497, 41881), (1351, 15407), (1519, 13703), (2201, 9457), (3479, 5983)]