20471980

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2011}}^1$

素因数の和:2529

約数の個数: 24

約数和(自身を含む): 43097040

約数和(自身を除く): 22625060

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2011, 2036, 2545, 4022, 5090, 8044, 10055, 10180, 20110, 40220, 1023599, 2047198, 4094396, 5117995, 10235990, 20471980]

約数ペア:

[(1, 20471980), (2, 10235990), (4, 5117995), (5, 4094396), (10, 2047198), (20, 1023599), (509, 40220), (1018, 20110), (2011, 10180), (2036, 10055), (2545, 8044), (4022, 5090)]