21538220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{2083}}^1$

素因数の和:2150

約数の個数: 48

約数和(自身を含む): 50416128

約数和(自身を除く): 28877908

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 47, 55, 94, 110, 188, 220, 235, 470, 517, 940, 1034, 2068, 2083, 2585, 4166, 5170, 8332, 10340, 10415, 20830, 22913, 41660, 45826, 91652, 97901, 114565, 195802, 229130, 391604, 458260, 489505, 979010, 1076911, 1958020, 2153822, 4307644, 5384555, 10769110, 21538220]

約数ペア:

[(1, 21538220), (2, 10769110), (4, 5384555), (5, 4307644), (10, 2153822), (11, 1958020), (20, 1076911), (22, 979010), (44, 489505), (47, 458260), (55, 391604), (94, 229130), (110, 195802), (188, 114565), (220, 97901), (235, 91652), (470, 45826), (517, 41660), (940, 22913), (1034, 20830), (2068, 10415), (2083, 10340), (2585, 8332), (4166, 5170)]