19721241

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{821}}^1$

素因数の和:1001

約数の個数: 24

約数和(自身を含む): 30390984

約数和(自身を除く): 10669743

約数列:

[1, 3, 9, 17, 51, 153, 157, 471, 821, 1413, 2463, 2669, 7389, 8007, 13957, 24021, 41871, 125613, 128897, 386691, 1160073, 2191249, 6573747, 19721241]

約数ペア:

[(1, 19721241), (3, 6573747), (9, 2191249), (17, 1160073), (51, 386691), (153, 128897), (157, 125613), (471, 41871), (821, 24021), (1413, 13957), (2463, 8007), (2669, 7389)]