21536656

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{233}}^1$

素因数の和:403

約数の個数: 40

約数和(自身を含む): 43088760

約数和(自身を除く): 21552104

約数列:

[1, 2, 4, 8, 16, 53, 106, 109, 212, 218, 233, 424, 436, 466, 848, 872, 932, 1744, 1864, 3728, 5777, 11554, 12349, 23108, 24698, 25397, 46216, 49396, 50794, 92432, 98792, 101588, 197584, 203176, 406352, 1346041, 2692082, 5384164, 10768328, 21536656]

約数ペア:

[(1, 21536656), (2, 10768328), (4, 5384164), (8, 2692082), (16, 1346041), (53, 406352), (106, 203176), (109, 197584), (212, 101588), (218, 98792), (233, 92432), (424, 50794), (436, 49396), (466, 46216), (848, 25397), (872, 24698), (932, 23108), (1744, 12349), (1864, 11554), (3728, 5777)]