21297440

素因数分解:

$2^5\times 5^1\times {\mathrm{133109}}^1$

素因数の和:133124

約数の個数: 24

約数和(自身を含む): 50315580

約数和(自身を除く): 29018140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133109, 266218, 532436, 665545, 1064872, 1331090, 2129744, 2662180, 4259488, 5324360, 10648720, 21297440]

約数ペア:

[(1, 21297440), (2, 10648720), (4, 5324360), (5, 4259488), (8, 2662180), (10, 2129744), (16, 1331090), (20, 1064872), (32, 665545), (40, 532436), (80, 266218), (160, 133109)]