20995208

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{293}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 43579620

約数和(自身を除く): 22584412

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 169, 212, 293, 338, 424, 586, 676, 689, 1172, 1352, 1378, 2344, 2756, 3809, 5512, 7618, 8957, 15236, 15529, 17914, 30472, 31058, 35828, 49517, 62116, 71656, 99034, 124232, 198068, 201877, 396136, 403754, 807508, 1615016, 2624401, 5248802, 10497604, 20995208]

約数ペア:

[(1, 20995208), (2, 10497604), (4, 5248802), (8, 2624401), (13, 1615016), (26, 807508), (52, 403754), (53, 396136), (104, 201877), (106, 198068), (169, 124232), (212, 99034), (293, 71656), (338, 62116), (424, 49517), (586, 35828), (676, 31058), (689, 30472), (1172, 17914), (1352, 15529), (1378, 15236), (2344, 8957), (2756, 7618), (3809, 5512)]