21470247

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 35043840

約数和(自身を除く): 13573593

約数列:

[1, 3, 9, 19, 23, 53, 57, 69, 103, 159, 171, 207, 309, 437, 477, 927, 1007, 1219, 1311, 1957, 2369, 3021, 3657, 3933, 5459, 5871, 7107, 9063, 10971, 16377, 17613, 21321, 23161, 45011, 49131, 69483, 103721, 125557, 135033, 208449, 311163, 376671, 405099, 933489, 1130013, 2385583, 7156749, 21470247]

約数ペア:

[(1, 21470247), (3, 7156749), (9, 2385583), (19, 1130013), (23, 933489), (53, 405099), (57, 376671), (69, 311163), (103, 208449), (159, 135033), (171, 125557), (207, 103721), (309, 69483), (437, 49131), (477, 45011), (927, 23161), (1007, 21321), (1219, 17613), (1311, 16377), (1957, 10971), (2369, 9063), (3021, 7107), (3657, 5871), (3933, 5459)]