1644280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:160

約数の個数: 64

約数和(自身を含む): 4186080

約数和(自身を除く): 2541800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 101, 110, 148, 185, 202, 220, 296, 370, 404, 407, 440, 505, 740, 808, 814, 1010, 1111, 1480, 1628, 2020, 2035, 2222, 3256, 3737, 4040, 4070, 4444, 5555, 7474, 8140, 8888, 11110, 14948, 16280, 18685, 22220, 29896, 37370, 41107, 44440, 74740, 82214, 149480, 164428, 205535, 328856, 411070, 822140, 1644280]

約数ペア:

[(1, 1644280), (2, 822140), (4, 411070), (5, 328856), (8, 205535), (10, 164428), (11, 149480), (20, 82214), (22, 74740), (37, 44440), (40, 41107), (44, 37370), (55, 29896), (74, 22220), (88, 18685), (101, 16280), (110, 14948), (148, 11110), (185, 8888), (202, 8140), (220, 7474), (296, 5555), (370, 4444), (404, 4070), (407, 4040), (440, 3737), (505, 3256), (740, 2222), (808, 2035), (814, 2020), (1010, 1628), (1111, 1480)]