18971500

素因数分解:

$2^2\times 5^3\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2035

約数の個数: 48

約数和(自身を含む): 43636320

約数和(自身を除く): 24664820

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 190, 250, 380, 475, 500, 950, 1900, 1997, 2375, 3994, 4750, 7988, 9500, 9985, 19970, 37943, 39940, 49925, 75886, 99850, 151772, 189715, 199700, 249625, 379430, 499250, 758860, 948575, 998500, 1897150, 3794300, 4742875, 9485750, 18971500]

約数ペア:

[(1, 18971500), (2, 9485750), (4, 4742875), (5, 3794300), (10, 1897150), (19, 998500), (20, 948575), (25, 758860), (38, 499250), (50, 379430), (76, 249625), (95, 199700), (100, 189715), (125, 151772), (190, 99850), (250, 75886), (380, 49925), (475, 39940), (500, 37943), (950, 19970), (1900, 9985), (1997, 9500), (2375, 7988), (3994, 4750)]