19903895

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{167}}^1\times {\mathrm{197}}^1$

素因数の和:391

約数の個数: 24

約数和(自身を含む): 26544672

約数和(自身を除く): 6640777

約数列:

[1, 5, 11, 55, 121, 167, 197, 605, 835, 985, 1837, 2167, 9185, 10835, 20207, 23837, 32899, 101035, 119185, 164495, 361889, 1809445, 3980779, 19903895]

約数ペア:

[(1, 19903895), (5, 3980779), (11, 1809445), (55, 361889), (121, 164495), (167, 119185), (197, 101035), (605, 32899), (835, 23837), (985, 20207), (1837, 10835), (2167, 9185)]