21781424

素因数分解:

$2^4\times 7^1\times {\mathrm{439}}^1\times {\mathrm{443}}^1$

素因数の和:897

約数の個数: 40

約数和(自身を含む): 48449280

約数和(自身を除く): 26667856

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 439, 443, 878, 886, 1756, 1772, 3073, 3101, 3512, 3544, 6146, 6202, 7024, 7088, 12292, 12404, 24584, 24808, 49168, 49616, 194477, 388954, 777908, 1361339, 1555816, 2722678, 3111632, 5445356, 10890712, 21781424]

約数ペア:

[(1, 21781424), (2, 10890712), (4, 5445356), (7, 3111632), (8, 2722678), (14, 1555816), (16, 1361339), (28, 777908), (56, 388954), (112, 194477), (439, 49616), (443, 49168), (878, 24808), (886, 24584), (1756, 12404), (1772, 12292), (3073, 7088), (3101, 7024), (3512, 6202), (3544, 6146)]