20486675

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 29998080

約数和(自身を除く): 9511405

約数列:

[1, 5, 11, 23, 25, 41, 55, 79, 115, 205, 253, 275, 395, 451, 575, 869, 943, 1025, 1265, 1817, 1975, 2255, 3239, 4345, 4715, 6325, 9085, 10373, 11275, 16195, 19987, 21725, 23575, 35629, 45425, 51865, 74497, 80975, 99935, 178145, 259325, 372485, 499675, 819467, 890725, 1862425, 4097335, 20486675]

約数ペア:

[(1, 20486675), (5, 4097335), (11, 1862425), (23, 890725), (25, 819467), (41, 499675), (55, 372485), (79, 259325), (115, 178145), (205, 99935), (253, 80975), (275, 74497), (395, 51865), (451, 45425), (575, 35629), (869, 23575), (943, 21725), (1025, 19987), (1265, 16195), (1817, 11275), (1975, 10373), (2255, 9085), (3239, 6325), (4345, 4715)]