3998800

素因数分解:

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

素因数の和:800

約数の個数: 60

約数和(自身を含む): 10359580

約数和(自身を除く): 6360780

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 769, 1040, 1300, 1538, 2600, 3076, 3845, 5200, 6152, 7690, 9997, 12304, 15380, 19225, 19994, 30760, 38450, 39988, 49985, 61520, 76900, 79976, 99970, 153800, 159952, 199940, 249925, 307600, 399880, 499850, 799760, 999700, 1999400, 3998800]

約数ペア:

[(1, 3998800), (2, 1999400), (4, 999700), (5, 799760), (8, 499850), (10, 399880), (13, 307600), (16, 249925), (20, 199940), (25, 159952), (26, 153800), (40, 99970), (50, 79976), (52, 76900), (65, 61520), (80, 49985), (100, 39988), (104, 38450), (130, 30760), (200, 19994), (208, 19225), (260, 15380), (325, 12304), (400, 9997), (520, 7690), (650, 6152), (769, 5200), (1040, 3845), (1300, 3076), (1538, 2600)]