20904875

素因数分解:

$5^3\times {\mathrm{41}}^1\times {\mathrm{4079}}^1$

素因数の和:4135

約数の個数: 16

約数和(自身を含む): 26732160

約数和(自身を除く): 5827285

約数列:

[1, 5, 25, 41, 125, 205, 1025, 4079, 5125, 20395, 101975, 167239, 509875, 836195, 4180975, 20904875]

約数ペア:

[(1, 20904875), (5, 4180975), (25, 836195), (41, 509875), (125, 167239), (205, 101975), (1025, 20395), (4079, 5125)]