20656215

素因数分解:

$3^7\times 5^1\times {\mathrm{1889}}^1$

素因数の和:1915

約数の個数: 32

約数和(自身を含む): 37195200

約数和(自身を除く): 16538985

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 1889, 2187, 3645, 5667, 9445, 10935, 17001, 28335, 51003, 85005, 153009, 255015, 459027, 765045, 1377081, 2295135, 4131243, 6885405, 20656215]

約数ペア:

[(1, 20656215), (3, 6885405), (5, 4131243), (9, 2295135), (15, 1377081), (27, 765045), (45, 459027), (81, 255015), (135, 153009), (243, 85005), (405, 51003), (729, 28335), (1215, 17001), (1889, 10935), (2187, 9445), (3645, 5667)]