19994000

素因数分解:

$2^4\times 5^3\times {\mathrm{13}}^1\times {\mathrm{769}}^1$

素因数の和:805

約数の個数: 80

約数和(自身を含む): 52132080

約数和(自身を除く): 32138080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 125, 130, 200, 208, 250, 260, 325, 400, 500, 520, 650, 769, 1000, 1040, 1300, 1538, 1625, 2000, 2600, 3076, 3250, 3845, 5200, 6152, 6500, 7690, 9997, 12304, 13000, 15380, 19225, 19994, 26000, 30760, 38450, 39988, 49985, 61520, 76900, 79976, 96125, 99970, 153800, 159952, 192250, 199940, 249925, 307600, 384500, 399880, 499850, 769000, 799760, 999700, 1249625, 1538000, 1999400, 2499250, 3998800, 4998500, 9997000, 19994000]

約数ペア:

[(1, 19994000), (2, 9997000), (4, 4998500), (5, 3998800), (8, 2499250), (10, 1999400), (13, 1538000), (16, 1249625), (20, 999700), (25, 799760), (26, 769000), (40, 499850), (50, 399880), (52, 384500), (65, 307600), (80, 249925), (100, 199940), (104, 192250), (125, 159952), (130, 153800), (200, 99970), (208, 96125), (250, 79976), (260, 76900), (325, 61520), (400, 49985), (500, 39988), (520, 38450), (650, 30760), (769, 26000), (1000, 19994), (1040, 19225), (1300, 15380), (1538, 13000), (1625, 12304), (2000, 9997), (2600, 7690), (3076, 6500), (3250, 6152), (3845, 5200)]