20791057

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:193

約数の個数: 32

約数和(自身を含む): 26426880

約数和(自身を除く): 5635823

約数列:

[1, 7, 23, 29, 61, 73, 161, 203, 427, 511, 667, 1403, 1679, 1769, 2117, 4453, 4669, 9821, 11753, 12383, 14819, 31171, 40687, 48691, 102419, 129137, 284809, 340837, 716933, 903959, 2970151, 20791057]

約数ペア:

[(1, 20791057), (7, 2970151), (23, 903959), (29, 716933), (61, 340837), (73, 284809), (161, 129137), (203, 102419), (427, 48691), (511, 40687), (667, 31171), (1403, 14819), (1679, 12383), (1769, 11753), (2117, 9821), (4453, 4669)]