21320915

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{701}}^1$

素因数の和:803

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 11027245

約数列:

[1, 5, 7, 11, 35, 55, 77, 79, 385, 395, 553, 701, 869, 2765, 3505, 4345, 4907, 6083, 7711, 24535, 30415, 38555, 53977, 55379, 269885, 276895, 387653, 609169, 1938265, 3045845, 4264183, 21320915]

約数ペア:

[(1, 21320915), (5, 4264183), (7, 3045845), (11, 1938265), (35, 609169), (55, 387653), (77, 276895), (79, 269885), (385, 55379), (395, 53977), (553, 38555), (701, 30415), (869, 24535), (2765, 7711), (3505, 6083), (4345, 4907)]