19721121

素因数分解:

$3^1\times 7^1\times {\mathrm{503}}^1\times {\mathrm{1867}}^1$

素因数の和:2380

約数の個数: 16

約数和(自身を含む): 30127104

約数和(自身を除く): 10405983

約数列:

[1, 3, 7, 21, 503, 1509, 1867, 3521, 5601, 10563, 13069, 39207, 939101, 2817303, 6573707, 19721121]

約数ペア:

[(1, 19721121), (3, 6573707), (7, 2817303), (21, 939101), (503, 39207), (1509, 13069), (1867, 10563), (3521, 5601)]