18445900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{409}}^1$

素因数の和:475

約数の個数: 72

約数和(自身を含む): 44840880

約数和(自身を除く): 26394980

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 41, 44, 50, 55, 82, 100, 110, 164, 205, 220, 275, 409, 410, 451, 550, 818, 820, 902, 1025, 1100, 1636, 1804, 2045, 2050, 2255, 4090, 4100, 4499, 4510, 8180, 8998, 9020, 10225, 11275, 16769, 17996, 20450, 22495, 22550, 33538, 40900, 44990, 45100, 67076, 83845, 89980, 112475, 167690, 184459, 224950, 335380, 368918, 419225, 449900, 737836, 838450, 922295, 1676900, 1844590, 3689180, 4611475, 9222950, 18445900]

約数ペア:

[(1, 18445900), (2, 9222950), (4, 4611475), (5, 3689180), (10, 1844590), (11, 1676900), (20, 922295), (22, 838450), (25, 737836), (41, 449900), (44, 419225), (50, 368918), (55, 335380), (82, 224950), (100, 184459), (110, 167690), (164, 112475), (205, 89980), (220, 83845), (275, 67076), (409, 45100), (410, 44990), (451, 40900), (550, 33538), (818, 22550), (820, 22495), (902, 20450), (1025, 17996), (1100, 16769), (1636, 11275), (1804, 10225), (2045, 9020), (2050, 8998), (2255, 8180), (4090, 4510), (4100, 4499)]