18990045

素因数分解:

$3^4\times 5^1\times {\mathrm{46889}}^1$

素因数の和:46906

約数の個数: 20

約数和(自身を含む): 34042140

約数和(自身を除く): 15052095

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 46889, 140667, 234445, 422001, 703335, 1266003, 2110005, 3798009, 6330015, 18990045]

約数ペア:

[(1, 18990045), (3, 6330015), (5, 3798009), (9, 2110005), (15, 1266003), (27, 703335), (45, 422001), (81, 234445), (135, 140667), (405, 46889)]