21135530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{367}}^1\times {\mathrm{443}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 41174784

約数和(自身を除く): 20039254

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 367, 443, 734, 886, 1835, 2215, 3670, 4430, 4771, 5759, 9542, 11518, 23855, 28795, 47710, 57590, 162581, 325162, 812905, 1625810, 2113553, 4227106, 10567765, 21135530]

約数ペア:

[(1, 21135530), (2, 10567765), (5, 4227106), (10, 2113553), (13, 1625810), (26, 812905), (65, 325162), (130, 162581), (367, 57590), (443, 47710), (734, 28795), (886, 23855), (1835, 11518), (2215, 9542), (3670, 5759), (4430, 4771)]