81640575

素因数分解:

$3^3\times 5^2\times {\mathrm{79}}^1\times {\mathrm{1531}}^1$

素因数の和:1629

約数の個数: 48

約数和(自身を含む): 151974400

約数和(自身を除く): 70333825

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 79, 135, 225, 237, 395, 675, 711, 1185, 1531, 1975, 2133, 3555, 4593, 5925, 7655, 10665, 13779, 17775, 22965, 38275, 41337, 53325, 68895, 114825, 120949, 206685, 344475, 362847, 604745, 1033425, 1088541, 1814235, 3023725, 3265623, 5442705, 9071175, 16328115, 27213525, 81640575]

約数ペア:

[(1, 81640575), (3, 27213525), (5, 16328115), (9, 9071175), (15, 5442705), (25, 3265623), (27, 3023725), (45, 1814235), (75, 1088541), (79, 1033425), (135, 604745), (225, 362847), (237, 344475), (395, 206685), (675, 120949), (711, 114825), (1185, 68895), (1531, 53325), (1975, 41337), (2133, 38275), (3555, 22965), (4593, 17775), (5925, 13779), (7655, 10665)]