20078235

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{389}}^1$

素因数の和:468

約数の個数: 48

約数和(自身を含む): 36990720

約数和(自身を除く): 16912485

約数列:

[1, 3, 5, 9, 15, 31, 37, 45, 93, 111, 155, 185, 279, 333, 389, 465, 555, 1147, 1167, 1395, 1665, 1945, 3441, 3501, 5735, 5835, 10323, 12059, 14393, 17205, 17505, 36177, 43179, 51615, 60295, 71965, 108531, 129537, 180885, 215895, 446183, 542655, 647685, 1338549, 2230915, 4015647, 6692745, 20078235]

約数ペア:

[(1, 20078235), (3, 6692745), (5, 4015647), (9, 2230915), (15, 1338549), (31, 647685), (37, 542655), (45, 446183), (93, 215895), (111, 180885), (155, 129537), (185, 108531), (279, 71965), (333, 60295), (389, 51615), (465, 43179), (555, 36177), (1147, 17505), (1167, 17205), (1395, 14393), (1665, 12059), (1945, 10323), (3441, 5835), (3501, 5735)]