20509225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 30373056

約数和(自身を除く): 9863831

約数列:

[1, 5, 11, 17, 25, 41, 55, 85, 107, 187, 205, 275, 425, 451, 535, 697, 935, 1025, 1177, 1819, 2255, 2675, 3485, 4387, 4675, 5885, 7667, 9095, 11275, 17425, 20009, 21935, 29425, 38335, 45475, 48257, 74579, 100045, 109675, 191675, 241285, 372895, 500225, 820369, 1206425, 1864475, 4101845, 20509225]

約数ペア:

[(1, 20509225), (5, 4101845), (11, 1864475), (17, 1206425), (25, 820369), (41, 500225), (55, 372895), (85, 241285), (107, 191675), (187, 109675), (205, 100045), (275, 74579), (425, 48257), (451, 45475), (535, 38335), (697, 29425), (935, 21935), (1025, 20009), (1177, 17425), (1819, 11275), (2255, 9095), (2675, 7667), (3485, 5885), (4387, 4675)]