648675

素因数分解:

$3^3\times 5^2\times {\mathrm{31}}^2$

素因数の和:81

約数の個数: 36

約数和(自身を含む): 1231320

約数和(自身を除く): 582645

約数列:

[1, 3, 5, 9, 15, 25, 27, 31, 45, 75, 93, 135, 155, 225, 279, 465, 675, 775, 837, 961, 1395, 2325, 2883, 4185, 4805, 6975, 8649, 14415, 20925, 24025, 25947, 43245, 72075, 129735, 216225, 648675]

約数ペア:

[(1, 648675), (3, 216225), (5, 129735), (9, 72075), (15, 43245), (25, 25947), (27, 24025), (31, 20925), (45, 14415), (75, 8649), (93, 6975), (135, 4805), (155, 4185), (225, 2883), (279, 2325), (465, 1395), (675, 961), (775, 837)]