19729040

素因数分解:

$2^4\times 5^1\times {\mathrm{246613}}^1$

素因数の和:246626

約数の個数: 20

約数和(自身を含む): 45870204

約数和(自身を除く): 26141164

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 246613, 493226, 986452, 1233065, 1972904, 2466130, 3945808, 4932260, 9864520, 19729040]

約数ペア:

[(1, 19729040), (2, 9864520), (4, 4932260), (5, 3945808), (8, 2466130), (10, 1972904), (16, 1233065), (20, 986452), (40, 493226), (80, 246613)]