21291531

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{7877}}^1$

素因数の和:7950

約数の個数: 16

約数和(自身を含む): 30629664

約数和(自身を除く): 9338133

約数列:

[1, 3, 17, 51, 53, 159, 901, 2703, 7877, 23631, 133909, 401727, 417481, 1252443, 7097177, 21291531]

約数ペア:

[(1, 21291531), (3, 7097177), (17, 1252443), (51, 417481), (53, 401727), (159, 133909), (901, 23631), (2703, 7877)]