21256980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1279}}^1$

素因数の和:1568

約数の個数: 48

約数和(自身を含む): 59781120

約数和(自身を除く): 38524140

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 277, 554, 831, 1108, 1279, 1385, 1662, 2558, 2770, 3324, 3837, 4155, 5116, 5540, 6395, 7674, 8310, 12790, 15348, 16620, 19185, 25580, 38370, 76740, 354283, 708566, 1062849, 1417132, 1771415, 2125698, 3542830, 4251396, 5314245, 7085660, 10628490, 21256980]

約数ペア:

[(1, 21256980), (2, 10628490), (3, 7085660), (4, 5314245), (5, 4251396), (6, 3542830), (10, 2125698), (12, 1771415), (15, 1417132), (20, 1062849), (30, 708566), (60, 354283), (277, 76740), (554, 38370), (831, 25580), (1108, 19185), (1279, 16620), (1385, 15348), (1662, 12790), (2558, 8310), (2770, 7674), (3324, 6395), (3837, 5540), (4155, 5116)]