21086956

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{11689}}^1$

素因数の和:11745

約数の個数: 24

約数和(自身を含む): 41242320

約数和(自身を除く): 20155364

約数列:

[1, 2, 4, 11, 22, 41, 44, 82, 164, 451, 902, 1804, 11689, 23378, 46756, 128579, 257158, 479249, 514316, 958498, 1916996, 5271739, 10543478, 21086956]

約数ペア:

[(1, 21086956), (2, 10543478), (4, 5271739), (11, 1916996), (22, 958498), (41, 514316), (44, 479249), (82, 257158), (164, 128579), (451, 46756), (902, 23378), (1804, 11689)]