20881725

素因数分解:

$3^1\times 5^2\times {\mathrm{509}}^1\times {\mathrm{547}}^1$

素因数の和:1069

約数の個数: 24

約数和(自身を含む): 34655520

約数和(自身を除く): 13773795

約数列:

[1, 3, 5, 15, 25, 75, 509, 547, 1527, 1641, 2545, 2735, 7635, 8205, 12725, 13675, 38175, 41025, 278423, 835269, 1392115, 4176345, 6960575, 20881725]

約数ペア:

[(1, 20881725), (3, 6960575), (5, 4176345), (15, 1392115), (25, 835269), (75, 278423), (509, 41025), (547, 38175), (1527, 13675), (1641, 12725), (2545, 8205), (2735, 7635)]