20285811

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:121

約数の個数: 96

約数和(自身を含む): 40255488

約数和(自身を除く): 19969677

約数列:

[1, 3, 7, 9, 13, 17, 21, 31, 39, 47, 51, 63, 91, 93, 117, 119, 141, 153, 217, 221, 273, 279, 329, 357, 403, 423, 527, 611, 651, 663, 799, 819, 987, 1071, 1209, 1457, 1547, 1581, 1833, 1953, 1989, 2397, 2821, 2961, 3627, 3689, 4277, 4371, 4641, 4743, 5499, 5593, 6851, 7191, 8463, 10199, 10387, 11067, 12831, 13113, 13923, 16779, 18941, 20553, 24769, 25389, 30597, 31161, 33201, 38493, 47957, 50337, 56823, 61659, 72709, 74307, 91791, 93483, 132587, 143871, 170469, 173383, 218127, 222921, 321997, 397761, 431613, 520149, 654381, 965991, 1193283, 1560447, 2253979, 2897973, 6761937, 20285811]

約数ペア:

[(1, 20285811), (3, 6761937), (7, 2897973), (9, 2253979), (13, 1560447), (17, 1193283), (21, 965991), (31, 654381), (39, 520149), (47, 431613), (51, 397761), (63, 321997), (91, 222921), (93, 218127), (117, 173383), (119, 170469), (141, 143871), (153, 132587), (217, 93483), (221, 91791), (273, 74307), (279, 72709), (329, 61659), (357, 56823), (403, 50337), (423, 47957), (527, 38493), (611, 33201), (651, 31161), (663, 30597), (799, 25389), (819, 24769), (987, 20553), (1071, 18941), (1209, 16779), (1457, 13923), (1547, 13113), (1581, 12831), (1833, 11067), (1953, 10387), (1989, 10199), (2397, 8463), (2821, 7191), (2961, 6851), (3627, 5593), (3689, 5499), (4277, 4743), (4371, 4641)]