21356209

素因数分解:

$7^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1$

素因数の和:182

約数の個数: 32

約数和(自身を含む): 27360000

約数和(自身を除く): 6003791

約数列:

[1, 7, 19, 29, 49, 113, 133, 203, 343, 551, 791, 931, 1421, 2147, 3277, 3857, 5537, 6517, 9947, 15029, 22939, 26999, 38759, 62263, 105203, 160573, 188993, 435841, 736421, 1124011, 3050887, 21356209]

約数ペア:

[(1, 21356209), (7, 3050887), (19, 1124011), (29, 736421), (49, 435841), (113, 188993), (133, 160573), (203, 105203), (343, 62263), (551, 38759), (791, 26999), (931, 22939), (1421, 15029), (2147, 9947), (3277, 6517), (3857, 5537)]