21006849

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{1487}}^1$

素因数の和:1784

約数の個数: 16

約数和(自身を含む): 29783808

約数和(自身を除く): 8776959

約数列:

[1, 3, 17, 51, 277, 831, 1487, 4461, 4709, 14127, 25279, 75837, 411899, 1235697, 7002283, 21006849]

約数ペア:

[(1, 21006849), (3, 7002283), (17, 1235697), (51, 411899), (277, 75837), (831, 25279), (1487, 14127), (4461, 4709)]