28000840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{100003}}^1$

素因数の和:100021

約数の個数: 32

約数和(自身を含む): 72002880

約数和(自身を除く): 44002040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 100003, 200006, 400012, 500015, 700021, 800024, 1000030, 1400042, 2000060, 2800084, 3500105, 4000120, 5600168, 7000210, 14000420, 28000840]

約数ペア:

[(1, 28000840), (2, 14000420), (4, 7000210), (5, 5600168), (7, 4000120), (8, 3500105), (10, 2800084), (14, 2000060), (20, 1400042), (28, 1000030), (35, 800024), (40, 700021), (56, 500015), (70, 400012), (140, 200006), (280, 100003)]