20905720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47513}}^1$

素因数の和:47535

約数の個数: 32

約数和(自身を含む): 51315120

約数和(自身を除く): 30409400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47513, 95026, 190052, 237565, 380104, 475130, 522643, 950260, 1045286, 1900520, 2090572, 2613215, 4181144, 5226430, 10452860, 20905720]

約数ペア:

[(1, 20905720), (2, 10452860), (4, 5226430), (5, 4181144), (8, 2613215), (10, 2090572), (11, 1900520), (20, 1045286), (22, 950260), (40, 522643), (44, 475130), (55, 380104), (88, 237565), (110, 190052), (220, 95026), (440, 47513)]