21303789

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{263}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 32169984

約数和(自身を除く): 10866195

約数列:

[1, 3, 13, 31, 39, 67, 93, 201, 263, 403, 789, 871, 1209, 2077, 2613, 3419, 6231, 8153, 10257, 17621, 24459, 27001, 52863, 81003, 105989, 229073, 317967, 546251, 687219, 1638753, 7101263, 21303789]

約数ペア:

[(1, 21303789), (3, 7101263), (13, 1638753), (31, 687219), (39, 546251), (67, 317967), (93, 229073), (201, 105989), (263, 81003), (403, 52863), (789, 27001), (871, 24459), (1209, 17621), (2077, 10257), (2613, 8153), (3419, 6231)]