21187155

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1759}}^1$

素因数の和:1851

約数の個数: 32

約数和(自身を含む): 37509120

約数和(自身を除く): 16321965

約数列:

[1, 3, 5, 11, 15, 33, 55, 73, 165, 219, 365, 803, 1095, 1759, 2409, 4015, 5277, 8795, 12045, 19349, 26385, 58047, 96745, 128407, 290235, 385221, 642035, 1412477, 1926105, 4237431, 7062385, 21187155]

約数ペア:

[(1, 21187155), (3, 7062385), (5, 4237431), (11, 1926105), (15, 1412477), (33, 642035), (55, 385221), (73, 290235), (165, 128407), (219, 96745), (365, 58047), (803, 26385), (1095, 19349), (1759, 12045), (2409, 8795), (4015, 5277)]