28000420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{200003}}^1$

素因数の和:200019

約数の個数: 24

約数和(自身を含む): 67201344

約数和(自身を除く): 39200924

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 200003, 400006, 800012, 1000015, 1400021, 2000030, 2800042, 4000060, 5600084, 7000105, 14000210, 28000420]

約数ペア:

[(1, 28000420), (2, 14000210), (4, 7000105), (5, 5600084), (7, 4000060), (10, 2800042), (14, 2000030), (20, 1400021), (28, 1000015), (35, 800012), (70, 400006), (140, 200003)]