21517958

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19961}}^1$

素因数の和:19988

約数の個数: 24

約数和(自身を含む): 40962024

約数和(自身を除く): 19444066

約数列:

[1, 2, 7, 11, 14, 22, 49, 77, 98, 154, 539, 1078, 19961, 39922, 139727, 219571, 279454, 439142, 978089, 1536997, 1956178, 3073994, 10758979, 21517958]

約数ペア:

[(1, 21517958), (2, 10758979), (7, 3073994), (11, 1956178), (14, 1536997), (22, 978089), (49, 439142), (77, 279454), (98, 219571), (154, 139727), (539, 39922), (1078, 19961)]