21428368

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1451}}^1$

素因数の和:1543

約数の個数: 40

約数和(自身を含む): 45372096

約数和(自身を除く): 23943728

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 71, 104, 142, 208, 284, 568, 923, 1136, 1451, 1846, 2902, 3692, 5804, 7384, 11608, 14768, 18863, 23216, 37726, 75452, 103021, 150904, 206042, 301808, 412084, 824168, 1339273, 1648336, 2678546, 5357092, 10714184, 21428368]

約数ペア:

[(1, 21428368), (2, 10714184), (4, 5357092), (8, 2678546), (13, 1648336), (16, 1339273), (26, 824168), (52, 412084), (71, 301808), (104, 206042), (142, 150904), (208, 103021), (284, 75452), (568, 37726), (923, 23216), (1136, 18863), (1451, 14768), (1846, 11608), (2902, 7384), (3692, 5804)]