18916205

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7019}}^1$

素因数の和:7049

約数の個数: 24

約数和(自身を含む): 28810080

約数和(自身を除く): 9893875

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 7019, 35095, 49133, 77209, 245665, 343931, 386045, 540463, 1719655, 2702315, 3783241, 18916205]

約数ペア:

[(1, 18916205), (5, 3783241), (7, 2702315), (11, 1719655), (35, 540463), (49, 386045), (55, 343931), (77, 245665), (245, 77209), (385, 49133), (539, 35095), (2695, 7019)]