20640567

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9772233

約数列:

[1, 3, 17, 47, 51, 79, 109, 141, 237, 327, 799, 1343, 1853, 2397, 3713, 4029, 5123, 5559, 8611, 11139, 15369, 25833, 63121, 87091, 146387, 189363, 261273, 404717, 439161, 1214151, 6880189, 20640567]

約数ペア:

[(1, 20640567), (3, 6880189), (17, 1214151), (47, 439161), (51, 404717), (79, 261273), (109, 189363), (141, 146387), (237, 87091), (327, 63121), (799, 25833), (1343, 15369), (1853, 11139), (2397, 8611), (3713, 5559), (4029, 5123)]