20784575

素因数分解:

$5^2\times 7^2\times {\mathrm{19}}^2\times {\mathrm{47}}^1$

素因数の和:109

約数の個数: 54

約数和(自身を含む): 32314896

約数和(自身を除く): 11530321

約数列:

[1, 5, 7, 19, 25, 35, 47, 49, 95, 133, 175, 235, 245, 329, 361, 475, 665, 893, 931, 1175, 1225, 1645, 1805, 2303, 2527, 3325, 4465, 4655, 6251, 8225, 9025, 11515, 12635, 16967, 17689, 22325, 23275, 31255, 43757, 57575, 63175, 84835, 88445, 118769, 156275, 218785, 424175, 442225, 593845, 831383, 1093925, 2969225, 4156915, 20784575]

約数ペア:

[(1, 20784575), (5, 4156915), (7, 2969225), (19, 1093925), (25, 831383), (35, 593845), (47, 442225), (49, 424175), (95, 218785), (133, 156275), (175, 118769), (235, 88445), (245, 84835), (329, 63175), (361, 57575), (475, 43757), (665, 31255), (893, 23275), (931, 22325), (1175, 17689), (1225, 16967), (1645, 12635), (1805, 11515), (2303, 9025), (2527, 8225), (3325, 6251), (4465, 4655)]