20665645

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4129}}^1$

素因数の和:4165

約数の個数: 32

約数和(自身を含む): 33304320

約数和(自身を除く): 12638675

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 4129, 5005, 20645, 28903, 45419, 53677, 144515, 227095, 268385, 317933, 375739, 590447, 1589665, 1878695, 2952235, 4133129, 20665645]

約数ペア:

[(1, 20665645), (5, 4133129), (7, 2952235), (11, 1878695), (13, 1589665), (35, 590447), (55, 375739), (65, 317933), (77, 268385), (91, 227095), (143, 144515), (385, 53677), (455, 45419), (715, 28903), (1001, 20645), (4129, 5005)]