20970945

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{347}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 39087360

約数和(自身を除く): 18116415

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 79, 85, 153, 237, 255, 347, 395, 711, 765, 1041, 1185, 1343, 1735, 3123, 3555, 4029, 5205, 5899, 6715, 12087, 15615, 17697, 20145, 27413, 29495, 53091, 60435, 82239, 88485, 137065, 246717, 265455, 411195, 466021, 1233585, 1398063, 2330105, 4194189, 6990315, 20970945]

約数ペア:

[(1, 20970945), (3, 6990315), (5, 4194189), (9, 2330105), (15, 1398063), (17, 1233585), (45, 466021), (51, 411195), (79, 265455), (85, 246717), (153, 137065), (237, 88485), (255, 82239), (347, 60435), (395, 53091), (711, 29495), (765, 27413), (1041, 20145), (1185, 17697), (1343, 15615), (1735, 12087), (3123, 6715), (3555, 5899), (4029, 5205)]