21681040

素因数分解:

$2^4\times 5^1\times {\mathrm{271013}}^1$

素因数の和:271026

約数の個数: 20

約数和(自身を含む): 50408604

約数和(自身を除く): 28727564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271013, 542026, 1084052, 1355065, 2168104, 2710130, 4336208, 5420260, 10840520, 21681040]

約数ペア:

[(1, 21681040), (2, 10840520), (4, 5420260), (5, 4336208), (8, 2710130), (10, 2168104), (16, 1355065), (20, 1084052), (40, 542026), (80, 271013)]