21086025

素因数分解:

$3^1\times 5^2\times {\mathrm{263}}^1\times {\mathrm{1069}}^1$

素因数の和:1345

約数の個数: 24

約数和(自身を含む): 35027520

約数和(自身を除く): 13941495

約数列:

[1, 3, 5, 15, 25, 75, 263, 789, 1069, 1315, 3207, 3945, 5345, 6575, 16035, 19725, 26725, 80175, 281147, 843441, 1405735, 4217205, 7028675, 21086025]

約数ペア:

[(1, 21086025), (3, 7028675), (5, 4217205), (15, 1405735), (25, 843441), (75, 281147), (263, 80175), (789, 26725), (1069, 19725), (1315, 16035), (3207, 6575), (3945, 5345)]