201721891

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{33863}}^1$

素因数の和:33930

約数の個数: 16

約数和(自身を含む): 247071744

約数和(自身を除く): 45349853

約数列:

[1, 7, 23, 37, 161, 259, 851, 5957, 33863, 237041, 778849, 1252931, 5451943, 8770517, 28817413, 201721891]

約数ペア:

[(1, 201721891), (7, 28817413), (23, 8770517), (37, 5451943), (161, 1252931), (259, 778849), (851, 237041), (5957, 33863)]