20175760

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{227}}^1$

素因数の和:352

約数の個数: 80

約数和(自身を含む): 51907392

約数和(自身を除く): 31731632

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 101, 110, 176, 202, 220, 227, 404, 440, 454, 505, 808, 880, 908, 1010, 1111, 1135, 1616, 1816, 2020, 2222, 2270, 2497, 3632, 4040, 4444, 4540, 4994, 5555, 8080, 8888, 9080, 9988, 11110, 12485, 17776, 18160, 19976, 22220, 22927, 24970, 39952, 44440, 45854, 49940, 88880, 91708, 99880, 114635, 183416, 199760, 229270, 252197, 366832, 458540, 504394, 917080, 1008788, 1260985, 1834160, 2017576, 2521970, 4035152, 5043940, 10087880, 20175760]

約数ペア:

[(1, 20175760), (2, 10087880), (4, 5043940), (5, 4035152), (8, 2521970), (10, 2017576), (11, 1834160), (16, 1260985), (20, 1008788), (22, 917080), (40, 504394), (44, 458540), (55, 366832), (80, 252197), (88, 229270), (101, 199760), (110, 183416), (176, 114635), (202, 99880), (220, 91708), (227, 88880), (404, 49940), (440, 45854), (454, 44440), (505, 39952), (808, 24970), (880, 22927), (908, 22220), (1010, 19976), (1111, 18160), (1135, 17776), (1616, 12485), (1816, 11110), (2020, 9988), (2222, 9080), (2270, 8888), (2497, 8080), (3632, 5555), (4040, 4994), (4444, 4540)]