20212120

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{5003}}^1$

素因数の和:5115

約数の個数: 32

約数和(自身を含む): 45936720

約数和(自身を除く): 25724600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 5003, 10006, 20012, 25015, 40024, 50030, 100060, 200120, 505303, 1010606, 2021212, 2526515, 4042424, 5053030, 10106060, 20212120]

約数ペア:

[(1, 20212120), (2, 10106060), (4, 5053030), (5, 4042424), (8, 2526515), (10, 2021212), (20, 1010606), (40, 505303), (101, 200120), (202, 100060), (404, 50030), (505, 40024), (808, 25015), (1010, 20012), (2020, 10006), (4040, 5003)]