20284695

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:213

約数の個数: 64

約数和(自身を含む): 38522880

約数和(自身を除く): 18238185

約数列:

[1, 3, 5, 9, 15, 27, 31, 37, 45, 93, 111, 131, 135, 155, 185, 279, 333, 393, 465, 555, 655, 837, 999, 1147, 1179, 1395, 1665, 1965, 3441, 3537, 4061, 4185, 4847, 4995, 5735, 5895, 10323, 12183, 14541, 17205, 17685, 20305, 24235, 30969, 36549, 43623, 51615, 60915, 72705, 109647, 130869, 150257, 154845, 182745, 218115, 450771, 548235, 654345, 751285, 1352313, 2253855, 4056939, 6761565, 20284695]

約数ペア:

[(1, 20284695), (3, 6761565), (5, 4056939), (9, 2253855), (15, 1352313), (27, 751285), (31, 654345), (37, 548235), (45, 450771), (93, 218115), (111, 182745), (131, 154845), (135, 150257), (155, 130869), (185, 109647), (279, 72705), (333, 60915), (393, 51615), (465, 43623), (555, 36549), (655, 30969), (837, 24235), (999, 20305), (1147, 17685), (1179, 17205), (1395, 14541), (1665, 12183), (1965, 10323), (3441, 5895), (3537, 5735), (4061, 4995), (4185, 4847)]