80001200

素因数分解:

$2^4\times 5^2\times {\mathrm{200003}}^1$

素因数の和:200021

約数の個数: 30

約数和(自身を含む): 192203844

約数和(自身を除く): 112202644

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 200003, 400006, 800012, 1000015, 1600024, 2000030, 3200048, 4000060, 5000075, 8000120, 10000150, 16000240, 20000300, 40000600, 80001200]

約数ペア:

[(1, 80001200), (2, 40000600), (4, 20000300), (5, 16000240), (8, 10000150), (10, 8000120), (16, 5000075), (20, 4000060), (25, 3200048), (40, 2000030), (50, 1600024), (80, 1000015), (100, 800012), (200, 400006), (400, 200003)]