20955015

素因数分解:

$3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6379}}^1$

素因数の和:6463

約数の個数: 24

約数和(自身を含む): 36825360

約数和(自身を除く): 15870345

約数列:

[1, 3, 5, 9, 15, 45, 73, 219, 365, 657, 1095, 3285, 6379, 19137, 31895, 57411, 95685, 287055, 465667, 1397001, 2328335, 4191003, 6985005, 20955015]

約数ペア:

[(1, 20955015), (3, 6985005), (5, 4191003), (9, 2328335), (15, 1397001), (45, 465667), (73, 287055), (219, 95685), (365, 57411), (657, 31895), (1095, 19137), (3285, 6379)]