21780963

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{881}}^1$

素因数の和:995

約数の個数: 24

約数和(自身を含む): 32746896

約数和(自身を除く): 10965933

約数列:

[1, 3, 9, 41, 67, 123, 201, 369, 603, 881, 2643, 2747, 7929, 8241, 24723, 36121, 59027, 108363, 177081, 325089, 531243, 2420107, 7260321, 21780963]

約数ペア:

[(1, 21780963), (3, 7260321), (9, 2420107), (41, 531243), (67, 325089), (123, 177081), (201, 108363), (369, 59027), (603, 36121), (881, 24723), (2643, 8241), (2747, 7929)]