21139228

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{479}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 22406372

約数列:

[1, 2, 4, 11, 17, 22, 34, 44, 59, 68, 118, 187, 236, 374, 479, 649, 748, 958, 1003, 1298, 1916, 2006, 2596, 4012, 5269, 8143, 10538, 11033, 16286, 21076, 22066, 28261, 32572, 44132, 56522, 89573, 113044, 179146, 310871, 358292, 480437, 621742, 960874, 1243484, 1921748, 5284807, 10569614, 21139228]

約数ペア:

[(1, 21139228), (2, 10569614), (4, 5284807), (11, 1921748), (17, 1243484), (22, 960874), (34, 621742), (44, 480437), (59, 358292), (68, 310871), (118, 179146), (187, 113044), (236, 89573), (374, 56522), (479, 44132), (649, 32572), (748, 28261), (958, 22066), (1003, 21076), (1298, 16286), (1916, 11033), (2006, 10538), (2596, 8143), (4012, 5269)]