21088925

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{347}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 32622912

約数和(自身を除く): 11533987

約数列:

[1, 5, 11, 13, 17, 25, 55, 65, 85, 143, 187, 221, 275, 325, 347, 425, 715, 935, 1105, 1735, 2431, 3575, 3817, 4511, 4675, 5525, 5899, 8675, 12155, 19085, 22555, 29495, 49621, 60775, 64889, 76687, 95425, 112775, 147475, 248105, 324445, 383435, 843557, 1240525, 1622225, 1917175, 4217785, 21088925]

約数ペア:

[(1, 21088925), (5, 4217785), (11, 1917175), (13, 1622225), (17, 1240525), (25, 843557), (55, 383435), (65, 324445), (85, 248105), (143, 147475), (187, 112775), (221, 95425), (275, 76687), (325, 64889), (347, 60775), (425, 49621), (715, 29495), (935, 22555), (1105, 19085), (1735, 12155), (2431, 8675), (3575, 5899), (3817, 5525), (4511, 4675)]