19909320

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{251}}^1\times {\mathrm{661}}^1$

素因数の和:926

約数の個数: 64

約数和(自身を含む): 60056640

約数和(自身を除く): 40147320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 251, 502, 661, 753, 1004, 1255, 1322, 1506, 1983, 2008, 2510, 2644, 3012, 3305, 3765, 3966, 5020, 5288, 6024, 6610, 7530, 7932, 9915, 10040, 13220, 15060, 15864, 19830, 26440, 30120, 39660, 79320, 165911, 331822, 497733, 663644, 829555, 995466, 1327288, 1659110, 1990932, 2488665, 3318220, 3981864, 4977330, 6636440, 9954660, 19909320]

約数ペア:

[(1, 19909320), (2, 9954660), (3, 6636440), (4, 4977330), (5, 3981864), (6, 3318220), (8, 2488665), (10, 1990932), (12, 1659110), (15, 1327288), (20, 995466), (24, 829555), (30, 663644), (40, 497733), (60, 331822), (120, 165911), (251, 79320), (502, 39660), (661, 30120), (753, 26440), (1004, 19830), (1255, 15864), (1322, 15060), (1506, 13220), (1983, 10040), (2008, 9915), (2510, 7932), (2644, 7530), (3012, 6610), (3305, 6024), (3765, 5288), (3966, 5020)]