18787941

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{281}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 31674240

約数和(自身を除く): 12886299

約数列:

[1, 3, 9, 17, 19, 23, 51, 57, 69, 153, 171, 207, 281, 323, 391, 437, 843, 969, 1173, 1311, 2529, 2907, 3519, 3933, 4777, 5339, 6463, 7429, 14331, 16017, 19389, 22287, 42993, 48051, 58167, 66861, 90763, 109871, 122797, 272289, 329613, 368391, 816867, 988839, 1105173, 2087549, 6262647, 18787941]

約数ペア:

[(1, 18787941), (3, 6262647), (9, 2087549), (17, 1105173), (19, 988839), (23, 816867), (51, 368391), (57, 329613), (69, 272289), (153, 122797), (171, 109871), (207, 90763), (281, 66861), (323, 58167), (391, 48051), (437, 42993), (843, 22287), (969, 19389), (1173, 16017), (1311, 14331), (2529, 7429), (2907, 6463), (3519, 5339), (3933, 4777)]