19947851

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{311}}^1$

素因数の和:360

約数の個数: 32

約数和(自身を含む): 26956800

約数和(自身を除く): 7008949

約数列:

[1, 7, 11, 17, 49, 77, 119, 187, 311, 343, 539, 833, 1309, 2177, 3421, 3773, 5287, 5831, 9163, 15239, 23947, 37009, 58157, 64141, 106673, 167629, 259063, 407099, 1173403, 1813441, 2849693, 19947851]

約数ペア:

[(1, 19947851), (7, 2849693), (11, 1813441), (17, 1173403), (49, 407099), (77, 259063), (119, 167629), (187, 106673), (311, 64141), (343, 58157), (539, 37009), (833, 23947), (1309, 15239), (2177, 9163), (3421, 5831), (3773, 5287)]