18218500

素因数分解:

$2^2\times 5^3\times {\mathrm{83}}^1\times {\mathrm{439}}^1$

素因数の和:541

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 22141820

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 83, 100, 125, 166, 250, 332, 415, 439, 500, 830, 878, 1660, 1756, 2075, 2195, 4150, 4390, 8300, 8780, 10375, 10975, 20750, 21950, 36437, 41500, 43900, 54875, 72874, 109750, 145748, 182185, 219500, 364370, 728740, 910925, 1821850, 3643700, 4554625, 9109250, 18218500]

約数ペア:

[(1, 18218500), (2, 9109250), (4, 4554625), (5, 3643700), (10, 1821850), (20, 910925), (25, 728740), (50, 364370), (83, 219500), (100, 182185), (125, 145748), (166, 109750), (250, 72874), (332, 54875), (415, 43900), (439, 41500), (500, 36437), (830, 21950), (878, 20750), (1660, 10975), (1756, 10375), (2075, 8780), (2195, 8300), (4150, 4390)]