21121040

素因数分解:

$2^4\times 5^1\times {\mathrm{264013}}^1$

素因数の和:264026

約数の個数: 20

約数和(自身を含む): 49106604

約数和(自身を除く): 27985564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264013, 528026, 1056052, 1320065, 2112104, 2640130, 4224208, 5280260, 10560520, 21121040]

約数ペア:

[(1, 21121040), (2, 10560520), (4, 5280260), (5, 4224208), (8, 2640130), (10, 2112104), (16, 1320065), (20, 1056052), (40, 528026), (80, 264013)]