21191608

素因数分解:

$2^3\times {\mathrm{73}}^1\times {\mathrm{131}}^1\times {\mathrm{277}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 40732560

約数和(自身を除く): 19540952

約数列:

[1, 2, 4, 8, 73, 131, 146, 262, 277, 292, 524, 554, 584, 1048, 1108, 2216, 9563, 19126, 20221, 36287, 38252, 40442, 72574, 76504, 80884, 145148, 161768, 290296, 2648951, 5297902, 10595804, 21191608]

約数ペア:

[(1, 21191608), (2, 10595804), (4, 5297902), (8, 2648951), (73, 290296), (131, 161768), (146, 145148), (262, 80884), (277, 76504), (292, 72574), (524, 40442), (554, 38252), (584, 36287), (1048, 20221), (1108, 19126), (2216, 9563)]