20518641

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 14862159

約数列:

[1, 3, 9, 11, 13, 33, 39, 99, 107, 117, 143, 149, 321, 429, 447, 963, 1177, 1287, 1341, 1391, 1639, 1937, 3531, 4173, 4917, 5811, 10593, 12519, 14751, 15301, 15943, 17433, 21307, 45903, 47829, 63921, 137709, 143487, 175373, 191763, 207259, 526119, 621777, 1578357, 1865331, 2279849, 6839547, 20518641]

約数ペア:

[(1, 20518641), (3, 6839547), (9, 2279849), (11, 1865331), (13, 1578357), (33, 621777), (39, 526119), (99, 207259), (107, 191763), (117, 175373), (143, 143487), (149, 137709), (321, 63921), (429, 47829), (447, 45903), (963, 21307), (1177, 17433), (1287, 15943), (1341, 15301), (1391, 14751), (1639, 12519), (1937, 10593), (3531, 5811), (4173, 4917)]