21217049

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{179}}^1$

素因数の和:293

約数の個数: 24

約数和(自身を含む): 25855200

約数和(自身を除く): 4638151

約数列:

[1, 7, 41, 49, 59, 179, 287, 413, 1253, 2009, 2419, 2891, 7339, 8771, 10561, 16933, 51373, 73927, 118531, 359611, 433001, 517489, 3031007, 21217049]

約数ペア:

[(1, 21217049), (7, 3031007), (41, 517489), (49, 433001), (59, 359611), (179, 118531), (287, 73927), (413, 51373), (1253, 16933), (2009, 10561), (2419, 8771), (2891, 7339)]