900400

素因数分解:

$2^4\times 5^2\times {\mathrm{2251}}^1$

素因数の和:2269

約数の個数: 30

約数和(自身を含む): 2164172

約数和(自身を除く): 1263772

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 2251, 4502, 9004, 11255, 18008, 22510, 36016, 45020, 56275, 90040, 112550, 180080, 225100, 450200, 900400]

約数ペア:

[(1, 900400), (2, 450200), (4, 225100), (5, 180080), (8, 112550), (10, 90040), (16, 56275), (20, 45020), (25, 36016), (40, 22510), (50, 18008), (80, 11255), (100, 9004), (200, 4502), (400, 2251)]