21403557

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17881}}^1$

素因数の和:17913

約数の個数: 24

約数和(自身を含む): 37194560

約数和(自身を除く): 15791003

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17881, 53643, 125167, 160929, 339739, 375501, 1019217, 1126503, 2378173, 3057651, 7134519, 21403557]

約数ペア:

[(1, 21403557), (3, 7134519), (7, 3057651), (9, 2378173), (19, 1126503), (21, 1019217), (57, 375501), (63, 339739), (133, 160929), (171, 125167), (399, 53643), (1197, 17881)]