19978000

素因数分解:

$2^4\times 5^3\times 7^1\times {\mathrm{1427}}^1$

素因数の和:1457

約数の個数: 80

約数和(自身を含む): 55246464

約数和(自身を除く): 35268464

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 50, 56, 70, 80, 100, 112, 125, 140, 175, 200, 250, 280, 350, 400, 500, 560, 700, 875, 1000, 1400, 1427, 1750, 2000, 2800, 2854, 3500, 5708, 7000, 7135, 9989, 11416, 14000, 14270, 19978, 22832, 28540, 35675, 39956, 49945, 57080, 71350, 79912, 99890, 114160, 142700, 159824, 178375, 199780, 249725, 285400, 356750, 399560, 499450, 570800, 713500, 799120, 998900, 1248625, 1427000, 1997800, 2497250, 2854000, 3995600, 4994500, 9989000, 19978000]

約数ペア:

[(1, 19978000), (2, 9989000), (4, 4994500), (5, 3995600), (7, 2854000), (8, 2497250), (10, 1997800), (14, 1427000), (16, 1248625), (20, 998900), (25, 799120), (28, 713500), (35, 570800), (40, 499450), (50, 399560), (56, 356750), (70, 285400), (80, 249725), (100, 199780), (112, 178375), (125, 159824), (140, 142700), (175, 114160), (200, 99890), (250, 79912), (280, 71350), (350, 57080), (400, 49945), (500, 39956), (560, 35675), (700, 28540), (875, 22832), (1000, 19978), (1400, 14270), (1427, 14000), (1750, 11416), (2000, 9989), (2800, 7135), (2854, 7000), (3500, 5708)]