21393040

素因数分解:

$2^4\times 5^1\times {\mathrm{267413}}^1$

素因数の和:267426

約数の個数: 20

約数和(自身を含む): 49739004

約数和(自身を除く): 28345964

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267413, 534826, 1069652, 1337065, 2139304, 2674130, 4278608, 5348260, 10696520, 21393040]

約数ペア:

[(1, 21393040), (2, 10696520), (4, 5348260), (5, 4278608), (8, 2674130), (10, 2139304), (16, 1337065), (20, 1069652), (40, 534826), (80, 267413)]