20152825

素因数分解:

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

素因数の和:95

約数の個数: 72

約数和(自身を含む): 34015680

約数和(自身を除く): 13862855

約数列:

[1, 5, 7, 11, 19, 25, 29, 35, 55, 77, 95, 133, 145, 175, 203, 209, 275, 319, 361, 385, 475, 551, 665, 725, 1015, 1045, 1463, 1595, 1805, 1925, 2233, 2527, 2755, 3325, 3857, 3971, 5075, 5225, 6061, 7315, 7975, 9025, 10469, 11165, 12635, 13775, 19285, 19855, 27797, 30305, 36575, 42427, 52345, 55825, 63175, 73283, 96425, 99275, 115159, 138985, 151525, 212135, 261725, 366415, 575795, 694925, 806113, 1060675, 1832075, 2878975, 4030565, 20152825]

約数ペア:

[(1, 20152825), (5, 4030565), (7, 2878975), (11, 1832075), (19, 1060675), (25, 806113), (29, 694925), (35, 575795), (55, 366415), (77, 261725), (95, 212135), (133, 151525), (145, 138985), (175, 115159), (203, 99275), (209, 96425), (275, 73283), (319, 63175), (361, 55825), (385, 52345), (475, 42427), (551, 36575), (665, 30305), (725, 27797), (1015, 19855), (1045, 19285), (1463, 13775), (1595, 12635), (1805, 11165), (1925, 10469), (2233, 9025), (2527, 7975), (2755, 7315), (3325, 6061), (3857, 5225), (3971, 5075)]