20780025

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{39581}}^1$

素因数の和:39601

約数の個数: 24

約数和(自身を含む): 39265344

約数和(自身を除く): 18485319

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525, 39581, 118743, 197905, 277067, 593715, 831201, 989525, 1385335, 2968575, 4156005, 6926675, 20780025]

約数ペア:

[(1, 20780025), (3, 6926675), (5, 4156005), (7, 2968575), (15, 1385335), (21, 989525), (25, 831201), (35, 593715), (75, 277067), (105, 197905), (175, 118743), (525, 39581)]