20666555

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{857}}^1$

素因数の和:935

約数の個数: 32

約数和(自身を含む): 31135104

約数和(自身を除く): 10468549

約数列:

[1, 5, 7, 13, 35, 53, 65, 91, 265, 371, 455, 689, 857, 1855, 3445, 4285, 4823, 5999, 11141, 24115, 29995, 45421, 55705, 77987, 227105, 317947, 389935, 590473, 1589735, 2952365, 4133311, 20666555]

約数ペア:

[(1, 20666555), (5, 4133311), (7, 2952365), (13, 1589735), (35, 590473), (53, 389935), (65, 317947), (91, 227105), (265, 77987), (371, 55705), (455, 45421), (689, 29995), (857, 24115), (1855, 11141), (3445, 5999), (4285, 4823)]