18989397

素因数分解:

$3^4\times 7^1\times {\mathrm{107}}^1\times {\mathrm{313}}^1$

素因数の和:439

約数の個数: 40

約数和(自身を含む): 32826816

約数和(自身を除く): 13837419

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 107, 189, 313, 321, 567, 749, 939, 963, 2191, 2247, 2817, 2889, 6573, 6741, 8451, 8667, 19719, 20223, 25353, 33491, 59157, 60669, 100473, 177471, 234437, 301419, 703311, 904257, 2109933, 2712771, 6329799, 18989397]

約数ペア:

[(1, 18989397), (3, 6329799), (7, 2712771), (9, 2109933), (21, 904257), (27, 703311), (63, 301419), (81, 234437), (107, 177471), (189, 100473), (313, 60669), (321, 59157), (567, 33491), (749, 25353), (939, 20223), (963, 19719), (2191, 8667), (2247, 8451), (2817, 6741), (2889, 6573)]