8999500

素因数分解:

$2^2\times 5^3\times {\mathrm{41}}^1\times {\mathrm{439}}^1$

素因数の和:499

約数の個数: 48

約数和(自身を含む): 20180160

約数和(自身を除く): 11180660

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 125, 164, 205, 250, 410, 439, 500, 820, 878, 1025, 1756, 2050, 2195, 4100, 4390, 5125, 8780, 10250, 10975, 17999, 20500, 21950, 35998, 43900, 54875, 71996, 89995, 109750, 179990, 219500, 359980, 449975, 899950, 1799900, 2249875, 4499750, 8999500]

約数ペア:

[(1, 8999500), (2, 4499750), (4, 2249875), (5, 1799900), (10, 899950), (20, 449975), (25, 359980), (41, 219500), (50, 179990), (82, 109750), (100, 89995), (125, 71996), (164, 54875), (205, 43900), (250, 35998), (410, 21950), (439, 20500), (500, 17999), (820, 10975), (878, 10250), (1025, 8780), (1756, 5125), (2050, 4390), (2195, 4100)]