20983956

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{281}}^1$

素因数の和:429

約数の個数: 72

約数和(自身を含む): 57609216

約数和(自身を除く): 36625260

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 127, 147, 196, 254, 281, 294, 381, 508, 562, 588, 762, 843, 889, 1124, 1524, 1686, 1778, 1967, 2667, 3372, 3556, 3934, 5334, 5901, 6223, 7868, 10668, 11802, 12446, 13769, 18669, 23604, 24892, 27538, 35687, 37338, 41307, 55076, 71374, 74676, 82614, 107061, 142748, 165228, 214122, 249809, 428244, 499618, 749427, 999236, 1498854, 1748663, 2997708, 3497326, 5245989, 6994652, 10491978, 20983956]

約数ペア:

[(1, 20983956), (2, 10491978), (3, 6994652), (4, 5245989), (6, 3497326), (7, 2997708), (12, 1748663), (14, 1498854), (21, 999236), (28, 749427), (42, 499618), (49, 428244), (84, 249809), (98, 214122), (127, 165228), (147, 142748), (196, 107061), (254, 82614), (281, 74676), (294, 71374), (381, 55076), (508, 41307), (562, 37338), (588, 35687), (762, 27538), (843, 24892), (889, 23604), (1124, 18669), (1524, 13769), (1686, 12446), (1778, 11802), (1967, 10668), (2667, 7868), (3372, 6223), (3556, 5901), (3934, 5334)]