81970180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{1979}}^1$

素因数の和:2116

約数の個数: 48

約数和(自身を含む): 182952000

約数和(自身を除く): 100981820

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 109, 190, 218, 380, 436, 545, 1090, 1979, 2071, 2180, 3958, 4142, 7916, 8284, 9895, 10355, 19790, 20710, 37601, 39580, 41420, 75202, 150404, 188005, 215711, 376010, 431422, 752020, 862844, 1078555, 2157110, 4098509, 4314220, 8197018, 16394036, 20492545, 40985090, 81970180]

約数ペア:

[(1, 81970180), (2, 40985090), (4, 20492545), (5, 16394036), (10, 8197018), (19, 4314220), (20, 4098509), (38, 2157110), (76, 1078555), (95, 862844), (109, 752020), (190, 431422), (218, 376010), (380, 215711), (436, 188005), (545, 150404), (1090, 75202), (1979, 41420), (2071, 39580), (2180, 37601), (3958, 20710), (4142, 19790), (7916, 10355), (8284, 9895)]