81208880

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{7993}}^1$

素因数の和:8133

約数の個数: 40

約数和(自身を含む): 190321152

約数和(自身を除く): 109112272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2540, 5080, 7993, 10160, 15986, 31972, 39965, 63944, 79930, 127888, 159860, 319720, 639440, 1015111, 2030222, 4060444, 5075555, 8120888, 10151110, 16241776, 20302220, 40604440, 81208880]

約数ペア:

[(1, 81208880), (2, 40604440), (4, 20302220), (5, 16241776), (8, 10151110), (10, 8120888), (16, 5075555), (20, 4060444), (40, 2030222), (80, 1015111), (127, 639440), (254, 319720), (508, 159860), (635, 127888), (1016, 79930), (1270, 63944), (2032, 39965), (2540, 31972), (5080, 15986), (7993, 10160)]