20371905

素因数分解:

$3^{11}\times 5^1\times {\mathrm{23}}^1$

素因数の和:61

約数の個数: 48

約数和(自身を含む): 38263680

約数和(自身を除く): 17891775

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 345, 405, 621, 729, 1035, 1215, 1863, 2187, 3105, 3645, 5589, 6561, 9315, 10935, 16767, 19683, 27945, 32805, 50301, 59049, 83835, 98415, 150903, 177147, 251505, 295245, 452709, 754515, 885735, 1358127, 2263545, 4074381, 6790635, 20371905]

約数ペア:

[(1, 20371905), (3, 6790635), (5, 4074381), (9, 2263545), (15, 1358127), (23, 885735), (27, 754515), (45, 452709), (69, 295245), (81, 251505), (115, 177147), (135, 150903), (207, 98415), (243, 83835), (345, 59049), (405, 50301), (621, 32805), (729, 27945), (1035, 19683), (1215, 16767), (1863, 10935), (2187, 9315), (3105, 6561), (3645, 5589)]