28131719

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{21491}}^1$

素因数の和:21526

約数の個数: 16

約数和(自身を含む): 37138176

約数和(自身を除く): 9006457

約数列:

[1, 7, 11, 17, 77, 119, 187, 1309, 21491, 150437, 236401, 365347, 1654807, 2557429, 4018817, 28131719]

約数ペア:

[(1, 28131719), (7, 4018817), (11, 2557429), (17, 1654807), (77, 365347), (119, 236401), (187, 150437), (1309, 21491)]