20959419

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{313}}^1$

素因数の和:447

約数の個数: 32

約数和(自身を含む): 32284224

約数和(自身を除く): 11324805

約数列:

[1, 3, 13, 17, 39, 51, 101, 221, 303, 313, 663, 939, 1313, 1717, 3939, 4069, 5151, 5321, 12207, 15963, 22321, 31613, 66963, 69173, 94839, 207519, 410969, 537421, 1232907, 1612263, 6986473, 20959419]

約数ペア:

[(1, 20959419), (3, 6986473), (13, 1612263), (17, 1232907), (39, 537421), (51, 410969), (101, 207519), (221, 94839), (303, 69173), (313, 66963), (663, 31613), (939, 22321), (1313, 15963), (1717, 12207), (3939, 5321), (4069, 5151)]