20961591

素因数分解:

$3^1\times 7^1\times {\mathrm{727}}^1\times {\mathrm{1373}}^1$

素因数の和:2110

約数の個数: 16

約数和(自身を含む): 32008704

約数和(自身を除く): 11047113

約数列:

[1, 3, 7, 21, 727, 1373, 2181, 4119, 5089, 9611, 15267, 28833, 998171, 2994513, 6987197, 20961591]

約数ペア:

[(1, 20961591), (3, 6987197), (7, 2994513), (21, 998171), (727, 28833), (1373, 15267), (2181, 9611), (4119, 5089)]