20272720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{193}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 51527952

約数和(自身を除く): 31255232

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 101, 104, 130, 193, 202, 208, 260, 386, 404, 505, 520, 772, 808, 965, 1010, 1040, 1313, 1544, 1616, 1930, 2020, 2509, 2626, 3088, 3860, 4040, 5018, 5252, 6565, 7720, 8080, 10036, 10504, 12545, 13130, 15440, 19493, 20072, 21008, 25090, 26260, 38986, 40144, 50180, 52520, 77972, 97465, 100360, 105040, 155944, 194930, 200720, 253409, 311888, 389860, 506818, 779720, 1013636, 1267045, 1559440, 2027272, 2534090, 4054544, 5068180, 10136360, 20272720]

約数ペア:

[(1, 20272720), (2, 10136360), (4, 5068180), (5, 4054544), (8, 2534090), (10, 2027272), (13, 1559440), (16, 1267045), (20, 1013636), (26, 779720), (40, 506818), (52, 389860), (65, 311888), (80, 253409), (101, 200720), (104, 194930), (130, 155944), (193, 105040), (202, 100360), (208, 97465), (260, 77972), (386, 52520), (404, 50180), (505, 40144), (520, 38986), (772, 26260), (808, 25090), (965, 21008), (1010, 20072), (1040, 19493), (1313, 15440), (1544, 13130), (1616, 12545), (1930, 10504), (2020, 10036), (2509, 8080), (2626, 7720), (3088, 6565), (3860, 5252), (4040, 5018)]