21490000

素因数分解:

$2^4\times 5^4\times 7^1\times {\mathrm{307}}^1$

素因数の和:342

約数の個数: 100

約数和(自身を含む): 59655904

約数和(自身を除く): 38165904

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, 307, 350, 400, 500, 560, 614, 625, 700, 875, 1000, 1228, 1250, 1400, 1535, 1750, 2000, 2149, 2456, 2500, 2800, 3070, 3500, 4298, 4375, 4912, 5000, 6140, 7000, 7675, 8596, 8750, 10000, 10745, 12280, 14000, 15350, 17192, 17500, 21490, 24560, 30700, 34384, 35000, 38375, 42980, 53725, 61400, 70000, 76750, 85960, 107450, 122800, 153500, 171920, 191875, 214900, 268625, 307000, 383750, 429800, 537250, 614000, 767500, 859600, 1074500, 1343125, 1535000, 2149000, 2686250, 3070000, 4298000, 5372500, 10745000, 21490000]

約数ペア:

[(1, 21490000), (2, 10745000), (4, 5372500), (5, 4298000), (7, 3070000), (8, 2686250), (10, 2149000), (14, 1535000), (16, 1343125), (20, 1074500), (25, 859600), (28, 767500), (35, 614000), (40, 537250), (50, 429800), (56, 383750), (70, 307000), (80, 268625), (100, 214900), (112, 191875), (125, 171920), (140, 153500), (175, 122800), (200, 107450), (250, 85960), (280, 76750), (307, 70000), (350, 61400), (400, 53725), (500, 42980), (560, 38375), (614, 35000), (625, 34384), (700, 30700), (875, 24560), (1000, 21490), (1228, 17500), (1250, 17192), (1400, 15350), (1535, 14000), (1750, 12280), (2000, 10745), (2149, 10000), (2456, 8750), (2500, 8596), (2800, 7675), (3070, 7000), (3500, 6140), (4298, 5000), (4375, 4912)]