20806155

素因数分解:

$3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2347}}^1$

素因数の和:2555

約数の個数: 24

約数和(自身を含む): 36262512

約数和(自身を除く): 15456357

約数列:

[1, 3, 5, 9, 15, 45, 197, 591, 985, 1773, 2347, 2955, 7041, 8865, 11735, 21123, 35205, 105615, 462359, 1387077, 2311795, 4161231, 6935385, 20806155]

約数ペア:

[(1, 20806155), (3, 6935385), (5, 4161231), (9, 2311795), (15, 1387077), (45, 462359), (197, 105615), (591, 35205), (985, 21123), (1773, 11735), (2347, 8865), (2955, 7041)]