12987980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{337}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 28619136

約数和(自身を除く): 15631156

約数列:

[1, 2, 4, 5, 10, 20, 41, 47, 82, 94, 164, 188, 205, 235, 337, 410, 470, 674, 820, 940, 1348, 1685, 1927, 3370, 3854, 6740, 7708, 9635, 13817, 15839, 19270, 27634, 31678, 38540, 55268, 63356, 69085, 79195, 138170, 158390, 276340, 316780, 649399, 1298798, 2597596, 3246995, 6493990, 12987980]

約数ペア:

[(1, 12987980), (2, 6493990), (4, 3246995), (5, 2597596), (10, 1298798), (20, 649399), (41, 316780), (47, 276340), (82, 158390), (94, 138170), (164, 79195), (188, 69085), (205, 63356), (235, 55268), (337, 38540), (410, 31678), (470, 27634), (674, 19270), (820, 15839), (940, 13817), (1348, 9635), (1685, 7708), (1927, 6740), (3370, 3854)]