21995739

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{277}}^1$

素因数の和:476

約数の個数: 32

約数和(自身を含む): 34827840

約数和(自身を除く): 12832101

約数列:

[1, 3, 9, 17, 27, 51, 153, 173, 277, 459, 519, 831, 1557, 2493, 2941, 4671, 4709, 7479, 8823, 14127, 26469, 42381, 47921, 79407, 127143, 143763, 431289, 814657, 1293867, 2443971, 7331913, 21995739]

約数ペア:

[(1, 21995739), (3, 7331913), (9, 2443971), (17, 1293867), (27, 814657), (51, 431289), (153, 143763), (173, 127143), (277, 79407), (459, 47921), (519, 42381), (831, 26469), (1557, 14127), (2493, 8823), (2941, 7479), (4671, 4709)]