18886779

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 31168800

約数和(自身を除く): 12282021

約数列:

[1, 3, 9, 17, 19, 51, 57, 73, 89, 153, 171, 219, 267, 323, 657, 801, 969, 1241, 1387, 1513, 1691, 2907, 3723, 4161, 4539, 5073, 6497, 11169, 12483, 13617, 15219, 19491, 23579, 28747, 58473, 70737, 86241, 110449, 123443, 212211, 258723, 331347, 370329, 994041, 1110987, 2098531, 6295593, 18886779]

約数ペア:

[(1, 18886779), (3, 6295593), (9, 2098531), (17, 1110987), (19, 994041), (51, 370329), (57, 331347), (73, 258723), (89, 212211), (153, 123443), (171, 110449), (219, 86241), (267, 70737), (323, 58473), (657, 28747), (801, 23579), (969, 19491), (1241, 15219), (1387, 13617), (1513, 12483), (1691, 11169), (2907, 6497), (3723, 5073), (4161, 4539)]