20996843

素因数分解:

$7^2\times {\mathrm{19}}^2\times {\mathrm{1187}}^1$

素因数の和:1239

約数の個数: 18

約数和(自身を含む): 25799796

約数和(自身を除く): 4802953

約数列:

[1, 7, 19, 49, 133, 361, 931, 1187, 2527, 8309, 17689, 22553, 58163, 157871, 428507, 1105097, 2999549, 20996843]

約数ペア:

[(1, 20996843), (7, 2999549), (19, 1105097), (49, 428507), (133, 157871), (361, 58163), (931, 22553), (1187, 17689), (2527, 8309)]