18156875

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1$

素因数の和:189

約数の個数: 40

約数和(自身を含む): 26241600

約数和(自身を除く): 8084725

約数列:

[1, 5, 11, 19, 25, 55, 95, 125, 139, 209, 275, 475, 625, 695, 1045, 1375, 1529, 2375, 2641, 3475, 5225, 6875, 7645, 11875, 13205, 17375, 26125, 29051, 38225, 66025, 86875, 130625, 145255, 191125, 330125, 726275, 955625, 1650625, 3631375, 18156875]

約数ペア:

[(1, 18156875), (5, 3631375), (11, 1650625), (19, 955625), (25, 726275), (55, 330125), (95, 191125), (125, 145255), (139, 130625), (209, 86875), (275, 66025), (475, 38225), (625, 29051), (695, 26125), (1045, 17375), (1375, 13205), (1529, 11875), (2375, 7645), (2641, 6875), (3475, 5225)]