18681278

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:185

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 18643522

約数列:

[1, 2, 7, 11, 14, 22, 29, 47, 58, 77, 89, 94, 154, 178, 203, 319, 329, 406, 517, 623, 638, 658, 979, 1034, 1246, 1363, 1958, 2233, 2581, 2726, 3619, 4183, 4466, 5162, 6853, 7238, 8366, 9541, 13706, 14993, 18067, 19082, 28391, 29281, 29986, 36134, 46013, 56782, 58562, 92026, 104951, 121307, 198737, 209902, 242614, 322091, 397474, 644182, 849149, 1334377, 1698298, 2668754, 9340639, 18681278]

約数ペア:

[(1, 18681278), (2, 9340639), (7, 2668754), (11, 1698298), (14, 1334377), (22, 849149), (29, 644182), (47, 397474), (58, 322091), (77, 242614), (89, 209902), (94, 198737), (154, 121307), (178, 104951), (203, 92026), (319, 58562), (329, 56782), (406, 46013), (517, 36134), (623, 29986), (638, 29281), (658, 28391), (979, 19082), (1034, 18067), (1246, 14993), (1363, 13706), (1958, 9541), (2233, 8366), (2581, 7238), (2726, 6853), (3619, 5162), (4183, 4466)]