21286216

素因数分解:

$2^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 47738880

約数和(自身を除く): 26452664

約数列:

[1, 2, 4, 7, 8, 14, 28, 41, 56, 73, 82, 127, 146, 164, 254, 287, 292, 328, 508, 511, 574, 584, 889, 1016, 1022, 1148, 1778, 2044, 2296, 2993, 3556, 4088, 5207, 5986, 7112, 9271, 10414, 11972, 18542, 20828, 20951, 23944, 36449, 37084, 41656, 41902, 64897, 72898, 74168, 83804, 129794, 145796, 167608, 259588, 291592, 380111, 519176, 760222, 1520444, 2660777, 3040888, 5321554, 10643108, 21286216]

約数ペア:

[(1, 21286216), (2, 10643108), (4, 5321554), (7, 3040888), (8, 2660777), (14, 1520444), (28, 760222), (41, 519176), (56, 380111), (73, 291592), (82, 259588), (127, 167608), (146, 145796), (164, 129794), (254, 83804), (287, 74168), (292, 72898), (328, 64897), (508, 41902), (511, 41656), (574, 37084), (584, 36449), (889, 23944), (1016, 20951), (1022, 20828), (1148, 18542), (1778, 11972), (2044, 10414), (2296, 9271), (2993, 7112), (3556, 5986), (4088, 5207)]