20380266

素因数分解:

$2^1\times 3^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{431}}^1$

素因数の和:547

約数の個数: 48

約数和(自身を含む): 46096128

約数和(自身を除く): 25715862

約数列:

[1, 2, 3, 6, 9, 18, 37, 71, 74, 111, 142, 213, 222, 333, 426, 431, 639, 666, 862, 1278, 1293, 2586, 2627, 3879, 5254, 7758, 7881, 15762, 15947, 23643, 30601, 31894, 47286, 47841, 61202, 91803, 95682, 143523, 183606, 275409, 287046, 550818, 1132237, 2264474, 3396711, 6793422, 10190133, 20380266]

約数ペア:

[(1, 20380266), (2, 10190133), (3, 6793422), (6, 3396711), (9, 2264474), (18, 1132237), (37, 550818), (71, 287046), (74, 275409), (111, 183606), (142, 143523), (213, 95682), (222, 91803), (333, 61202), (426, 47841), (431, 47286), (639, 31894), (666, 30601), (862, 23643), (1278, 15947), (1293, 15762), (2586, 7881), (2627, 7758), (3879, 5254)]