28784420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{205603}}^1$

素因数の和:205619

約数の個数: 24

約数和(自身を含む): 69082944

約数和(自身を除く): 40298524

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 205603, 411206, 822412, 1028015, 1439221, 2056030, 2878442, 4112060, 5756884, 7196105, 14392210, 28784420]

約数ペア:

[(1, 28784420), (2, 14392210), (4, 7196105), (5, 5756884), (7, 4112060), (10, 2878442), (14, 2056030), (20, 1439221), (28, 1028015), (35, 822412), (70, 411206), (140, 205603)]