21604671

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{389}}^1$

素因数の和:437

約数の個数: 48

約数和(自身を含む): 37346400

約数和(自身を除く): 15741729

約数列:

[1, 3, 9, 11, 17, 27, 33, 51, 99, 121, 153, 187, 297, 363, 389, 459, 561, 1089, 1167, 1683, 2057, 3267, 3501, 4279, 5049, 6171, 6613, 10503, 12837, 18513, 19839, 38511, 47069, 55539, 59517, 72743, 115533, 141207, 178551, 218229, 423621, 654687, 800173, 1270863, 1964061, 2400519, 7201557, 21604671]

約数ペア:

[(1, 21604671), (3, 7201557), (9, 2400519), (11, 1964061), (17, 1270863), (27, 800173), (33, 654687), (51, 423621), (99, 218229), (121, 178551), (153, 141207), (187, 115533), (297, 72743), (363, 59517), (389, 55539), (459, 47069), (561, 38511), (1089, 19839), (1167, 18513), (1683, 12837), (2057, 10503), (3267, 6613), (3501, 6171), (4279, 5049)]