21016863

素因数分解:

$3^2\times 7^1\times {\mathrm{271}}^1\times {\mathrm{1231}}^1$

素因数の和:1515

約数の個数: 24

約数和(自身を含む): 34850816

約数和(自身を除く): 13833953

約数列:

[1, 3, 7, 9, 21, 63, 271, 813, 1231, 1897, 2439, 3693, 5691, 8617, 11079, 17073, 25851, 77553, 333601, 1000803, 2335207, 3002409, 7005621, 21016863]

約数ペア:

[(1, 21016863), (3, 7005621), (7, 3002409), (9, 2335207), (21, 1000803), (63, 333601), (271, 77553), (813, 25851), (1231, 17073), (1897, 11079), (2439, 8617), (3693, 5691)]