81662399

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{647}}^1$

素因数の和:759

約数の個数: 32

約数和(自身を含む): 107412480

約数和(自身を除く): 25750081

約数列:

[1, 7, 13, 19, 73, 91, 133, 247, 511, 647, 949, 1387, 1729, 4529, 6643, 8411, 9709, 12293, 18031, 47231, 58877, 86051, 126217, 159809, 330617, 614003, 897389, 1118663, 4298021, 6281723, 11666057, 81662399]

約数ペア:

[(1, 81662399), (7, 11666057), (13, 6281723), (19, 4298021), (73, 1118663), (91, 897389), (133, 614003), (247, 330617), (511, 159809), (647, 126217), (949, 86051), (1387, 58877), (1729, 47231), (4529, 18031), (6643, 12293), (8411, 9709)]