81857025

素因数分解:

$3^2\times 5^2\times {\mathrm{363809}}^1$

素因数の和:363825

約数の個数: 18

約数和(自身を含む): 146615430

約数和(自身を除く): 64758405

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 363809, 1091427, 1819045, 3274281, 5457135, 9095225, 16371405, 27285675, 81857025]

約数ペア:

[(1, 81857025), (3, 27285675), (5, 16371405), (9, 9095225), (15, 5457135), (25, 3274281), (45, 1819045), (75, 1091427), (225, 363809)]