28108920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:437

約数の個数: 128

約数和(自身を含む): 97574400

約数和(自身を除く): 69465480

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 109, 120, 140, 168, 210, 218, 280, 307, 327, 420, 436, 545, 614, 654, 763, 840, 872, 921, 1090, 1228, 1308, 1526, 1535, 1635, 1842, 2149, 2180, 2289, 2456, 2616, 3052, 3070, 3270, 3684, 3815, 4298, 4360, 4578, 4605, 6104, 6140, 6447, 6540, 7368, 7630, 8596, 9156, 9210, 10745, 11445, 12280, 12894, 13080, 15260, 17192, 18312, 18420, 21490, 22890, 25788, 30520, 32235, 33463, 36840, 42980, 45780, 51576, 64470, 66926, 85960, 91560, 100389, 128940, 133852, 167315, 200778, 234241, 257880, 267704, 334630, 401556, 468482, 501945, 669260, 702723, 803112, 936964, 1003890, 1171205, 1338520, 1405446, 1873928, 2007780, 2342410, 2810892, 3513615, 4015560, 4684820, 5621784, 7027230, 9369640, 14054460, 28108920]

約数ペア:

[(1, 28108920), (2, 14054460), (3, 9369640), (4, 7027230), (5, 5621784), (6, 4684820), (7, 4015560), (8, 3513615), (10, 2810892), (12, 2342410), (14, 2007780), (15, 1873928), (20, 1405446), (21, 1338520), (24, 1171205), (28, 1003890), (30, 936964), (35, 803112), (40, 702723), (42, 669260), (56, 501945), (60, 468482), (70, 401556), (84, 334630), (105, 267704), (109, 257880), (120, 234241), (140, 200778), (168, 167315), (210, 133852), (218, 128940), (280, 100389), (307, 91560), (327, 85960), (420, 66926), (436, 64470), (545, 51576), (614, 45780), (654, 42980), (763, 36840), (840, 33463), (872, 32235), (921, 30520), (1090, 25788), (1228, 22890), (1308, 21490), (1526, 18420), (1535, 18312), (1635, 17192), (1842, 15260), (2149, 13080), (2180, 12894), (2289, 12280), (2456, 11445), (2616, 10745), (3052, 9210), (3070, 9156), (3270, 8596), (3684, 7630), (3815, 7368), (4298, 6540), (4360, 6447), (4578, 6140), (4605, 6104)]