28213955

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1$

素因数の和:97

約数の個数: 72

約数和(自身を含む): 46908720

約数和(自身を除く): 18694765

約数列:

[1, 5, 7, 11, 19, 29, 35, 49, 55, 77, 95, 133, 145, 203, 209, 245, 319, 361, 385, 539, 551, 665, 931, 1015, 1045, 1421, 1463, 1595, 1805, 2233, 2527, 2695, 2755, 3857, 3971, 4655, 6061, 7105, 7315, 10241, 10469, 11165, 12635, 15631, 17689, 19285, 19855, 26999, 27797, 30305, 42427, 51205, 52345, 73283, 78155, 88445, 115159, 134995, 138985, 194579, 212135, 296989, 366415, 512981, 575795, 806113, 972895, 1484945, 2564905, 4030565, 5642791, 28213955]

約数ペア:

[(1, 28213955), (5, 5642791), (7, 4030565), (11, 2564905), (19, 1484945), (29, 972895), (35, 806113), (49, 575795), (55, 512981), (77, 366415), (95, 296989), (133, 212135), (145, 194579), (203, 138985), (209, 134995), (245, 115159), (319, 88445), (361, 78155), (385, 73283), (539, 52345), (551, 51205), (665, 42427), (931, 30305), (1015, 27797), (1045, 26999), (1421, 19855), (1463, 19285), (1595, 17689), (1805, 15631), (2233, 12635), (2527, 11165), (2695, 10469), (2755, 10241), (3857, 7315), (3971, 7105), (4655, 6061)]