21951709

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1399}}^1$

素因数の和:1500

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 3449891

約数列:

[1, 13, 17, 71, 221, 923, 1207, 1399, 15691, 18187, 23783, 99329, 309179, 1291277, 1688593, 21951709]

約数ペア:

[(1, 21951709), (13, 1688593), (17, 1291277), (71, 309179), (221, 99329), (923, 23783), (1207, 18187), (1399, 15691)]