278987121

素因数分解:

$3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{17231}}^1$

素因数の和:17501

約数の個数: 24

約数和(自身を含む): 462369024

約数和(自身を除く): 183381903

約数列:

[1, 3, 7, 9, 21, 63, 257, 771, 1799, 2313, 5397, 16191, 17231, 51693, 120617, 155079, 361851, 1085553, 4428367, 13285101, 30998569, 39855303, 92995707, 278987121]

約数ペア:

[(1, 278987121), (3, 92995707), (7, 39855303), (9, 30998569), (21, 13285101), (63, 4428367), (257, 1085553), (771, 361851), (1799, 155079), (2313, 120617), (5397, 51693), (16191, 17231)]