20916519

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{127}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 31309824

約数和(自身を除く): 10393305

約数列:

[1, 3, 13, 39, 41, 103, 123, 127, 309, 381, 533, 1339, 1599, 1651, 4017, 4223, 4953, 5207, 12669, 13081, 15621, 39243, 54899, 67691, 164697, 170053, 203073, 510159, 536321, 1608963, 6972173, 20916519]

約数ペア:

[(1, 20916519), (3, 6972173), (13, 1608963), (39, 536321), (41, 510159), (103, 203073), (123, 170053), (127, 164697), (309, 67691), (381, 54899), (533, 39243), (1339, 15621), (1599, 13081), (1651, 12669), (4017, 5207), (4223, 4953)]