81820175

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{613}}^1$

素因数の和:923

約数の個数: 24

約数和(自身を含む): 107351760

約数和(自身を除く): 25531585

約数列:

[1, 5, 19, 25, 95, 281, 475, 613, 1405, 3065, 5339, 7025, 11647, 15325, 26695, 58235, 133475, 172253, 291175, 861265, 3272807, 4306325, 16364035, 81820175]

約数ペア:

[(1, 81820175), (5, 16364035), (19, 4306325), (25, 3272807), (95, 861265), (281, 291175), (475, 172253), (613, 133475), (1405, 58235), (3065, 26695), (5339, 15325), (7025, 11647)]