18002800

素因数分解:

$2^4\times 5^2\times {\mathrm{45007}}^1$

素因数の和:45025

約数の個数: 30

約数和(自身を含む): 43252688

約数和(自身を除く): 25249888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 45007, 90014, 180028, 225035, 360056, 450070, 720112, 900140, 1125175, 1800280, 2250350, 3600560, 4500700, 9001400, 18002800]

約数ペア:

[(1, 18002800), (2, 9001400), (4, 4500700), (5, 3600560), (8, 2250350), (10, 1800280), (16, 1125175), (20, 900140), (25, 720112), (40, 450070), (50, 360056), (80, 225035), (100, 180028), (200, 90014), (400, 45007)]