21717160

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{293}}^1$

素因数の和:430

約数の個数: 64

約数和(自身を含む): 52390800

約数和(自身を除く): 30673640

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 109, 136, 170, 218, 293, 340, 436, 545, 586, 680, 872, 1090, 1172, 1465, 1853, 2180, 2344, 2930, 3706, 4360, 4981, 5860, 7412, 9265, 9962, 11720, 14824, 18530, 19924, 24905, 31937, 37060, 39848, 49810, 63874, 74120, 99620, 127748, 159685, 199240, 255496, 319370, 542929, 638740, 1085858, 1277480, 2171716, 2714645, 4343432, 5429290, 10858580, 21717160]

約数ペア:

[(1, 21717160), (2, 10858580), (4, 5429290), (5, 4343432), (8, 2714645), (10, 2171716), (17, 1277480), (20, 1085858), (34, 638740), (40, 542929), (68, 319370), (85, 255496), (109, 199240), (136, 159685), (170, 127748), (218, 99620), (293, 74120), (340, 63874), (436, 49810), (545, 39848), (586, 37060), (680, 31937), (872, 24905), (1090, 19924), (1172, 18530), (1465, 14824), (1853, 11720), (2180, 9962), (2344, 9265), (2930, 7412), (3706, 5860), (4360, 4981)]