20818490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1423}}^1$

素因数の和:1467

約数の個数: 64

約数和(自身を含む): 49213440

約数和(自身を除く): 28394950

約数列:

[1, 2, 5, 7, 10, 11, 14, 19, 22, 35, 38, 55, 70, 77, 95, 110, 133, 154, 190, 209, 266, 385, 418, 665, 770, 1045, 1330, 1423, 1463, 2090, 2846, 2926, 7115, 7315, 9961, 14230, 14630, 15653, 19922, 27037, 31306, 49805, 54074, 78265, 99610, 109571, 135185, 156530, 189259, 219142, 270370, 297407, 378518, 547855, 594814, 946295, 1095710, 1487035, 1892590, 2081849, 2974070, 4163698, 10409245, 20818490]

約数ペア:

[(1, 20818490), (2, 10409245), (5, 4163698), (7, 2974070), (10, 2081849), (11, 1892590), (14, 1487035), (19, 1095710), (22, 946295), (35, 594814), (38, 547855), (55, 378518), (70, 297407), (77, 270370), (95, 219142), (110, 189259), (133, 156530), (154, 135185), (190, 109571), (209, 99610), (266, 78265), (385, 54074), (418, 49805), (665, 31306), (770, 27037), (1045, 19922), (1330, 15653), (1423, 14630), (1463, 14230), (2090, 9961), (2846, 7315), (2926, 7115)]