18686213

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 24966144

約数和(自身を除く): 6279931

約数列:

[1, 7, 13, 17, 47, 91, 119, 221, 257, 329, 611, 799, 1547, 1799, 3341, 4277, 4369, 5593, 10387, 12079, 23387, 30583, 56797, 72709, 84553, 157027, 205343, 397579, 1099189, 1437401, 2669459, 18686213]

約数ペア:

[(1, 18686213), (7, 2669459), (13, 1437401), (17, 1099189), (47, 397579), (91, 205343), (119, 157027), (221, 84553), (257, 72709), (329, 56797), (611, 30583), (799, 23387), (1547, 12079), (1799, 10387), (3341, 5593), (4277, 4369)]