21047020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{601}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 47331648

約数和(自身を除く): 26284628

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 103, 170, 206, 340, 412, 515, 601, 1030, 1202, 1751, 2060, 2404, 3005, 3502, 6010, 7004, 8755, 10217, 12020, 17510, 20434, 35020, 40868, 51085, 61903, 102170, 123806, 204340, 247612, 309515, 619030, 1052351, 1238060, 2104702, 4209404, 5261755, 10523510, 21047020]

約数ペア:

[(1, 21047020), (2, 10523510), (4, 5261755), (5, 4209404), (10, 2104702), (17, 1238060), (20, 1052351), (34, 619030), (68, 309515), (85, 247612), (103, 204340), (170, 123806), (206, 102170), (340, 61903), (412, 51085), (515, 40868), (601, 35020), (1030, 20434), (1202, 17510), (1751, 12020), (2060, 10217), (2404, 8755), (3005, 7004), (3502, 6010)]