1800080

素因数分解:

$2^4\times 5^1\times {\mathrm{22501}}^1$

素因数の和:22514

約数の個数: 20

約数和(自身を含む): 4185372

約数和(自身を除く): 2385292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 22501, 45002, 90004, 112505, 180008, 225010, 360016, 450020, 900040, 1800080]

約数ペア:

[(1, 1800080), (2, 900040), (4, 450020), (5, 360016), (8, 225010), (10, 180008), (16, 112505), (20, 90004), (40, 45002), (80, 22501)]