18039500

素因数分解:

$2^2\times 5^3\times {\mathrm{109}}^1\times {\mathrm{331}}^1$

素因数の和:459

約数の個数: 48

約数和(自身を含む): 39879840

約数和(自身を除く): 21840340

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 109, 125, 218, 250, 331, 436, 500, 545, 662, 1090, 1324, 1655, 2180, 2725, 3310, 5450, 6620, 8275, 10900, 13625, 16550, 27250, 33100, 36079, 41375, 54500, 72158, 82750, 144316, 165500, 180395, 360790, 721580, 901975, 1803950, 3607900, 4509875, 9019750, 18039500]

約数ペア:

[(1, 18039500), (2, 9019750), (4, 4509875), (5, 3607900), (10, 1803950), (20, 901975), (25, 721580), (50, 360790), (100, 180395), (109, 165500), (125, 144316), (218, 82750), (250, 72158), (331, 54500), (436, 41375), (500, 36079), (545, 33100), (662, 27250), (1090, 16550), (1324, 13625), (1655, 10900), (2180, 8275), (2725, 6620), (3310, 5450)]