19909960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{337}}^1$

素因数の和:566

約数の個数: 64

約数和(自身を含む): 51592320

約数和(自身を除く): 31682360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 211, 280, 337, 422, 674, 844, 1055, 1348, 1477, 1685, 1688, 2110, 2359, 2696, 2954, 3370, 4220, 4718, 5908, 6740, 7385, 8440, 9436, 11795, 11816, 13480, 14770, 18872, 23590, 29540, 47180, 59080, 71107, 94360, 142214, 284428, 355535, 497749, 568856, 711070, 995498, 1422140, 1990996, 2488745, 2844280, 3981992, 4977490, 9954980, 19909960]

約数ペア:

[(1, 19909960), (2, 9954980), (4, 4977490), (5, 3981992), (7, 2844280), (8, 2488745), (10, 1990996), (14, 1422140), (20, 995498), (28, 711070), (35, 568856), (40, 497749), (56, 355535), (70, 284428), (140, 142214), (211, 94360), (280, 71107), (337, 59080), (422, 47180), (674, 29540), (844, 23590), (1055, 18872), (1348, 14770), (1477, 13480), (1685, 11816), (1688, 11795), (2110, 9436), (2359, 8440), (2696, 7385), (2954, 6740), (3370, 5908), (4220, 4718)]