20955880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{491}}^1$

素因数の和:610

約数の個数: 64

約数和(自身を含む): 52073280

約数和(自身を除く): 31117400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 97, 110, 194, 220, 388, 440, 485, 491, 776, 970, 982, 1067, 1940, 1964, 2134, 2455, 3880, 3928, 4268, 4910, 5335, 5401, 8536, 9820, 10670, 10802, 19640, 21340, 21604, 27005, 42680, 43208, 47627, 54010, 95254, 108020, 190508, 216040, 238135, 381016, 476270, 523897, 952540, 1047794, 1905080, 2095588, 2619485, 4191176, 5238970, 10477940, 20955880]

約数ペア:

[(1, 20955880), (2, 10477940), (4, 5238970), (5, 4191176), (8, 2619485), (10, 2095588), (11, 1905080), (20, 1047794), (22, 952540), (40, 523897), (44, 476270), (55, 381016), (88, 238135), (97, 216040), (110, 190508), (194, 108020), (220, 95254), (388, 54010), (440, 47627), (485, 43208), (491, 42680), (776, 27005), (970, 21604), (982, 21340), (1067, 19640), (1940, 10802), (1964, 10670), (2134, 9820), (2455, 8536), (3880, 5401), (3928, 5335), (4268, 4910)]