1980045

素因数分解:

$3^4\times 5^1\times {\mathrm{4889}}^1$

素因数の和:4906

約数の個数: 20

約数和(自身を含む): 3550140

約数和(自身を除く): 1570095

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 4889, 14667, 24445, 44001, 73335, 132003, 220005, 396009, 660015, 1980045]

約数ペア:

[(1, 1980045), (3, 660015), (5, 396009), (9, 220005), (15, 132003), (27, 73335), (45, 44001), (81, 24445), (135, 14667), (405, 4889)]