21605481

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{311}}^1$

素因数の和:434

約数の個数: 32

約数和(自身を含む): 33546240

約数和(自身を除く): 11940759

約数列:

[1, 3, 9, 27, 31, 83, 93, 249, 279, 311, 747, 837, 933, 2241, 2573, 2799, 7719, 8397, 9641, 23157, 25813, 28923, 69471, 77439, 86769, 232317, 260307, 696951, 800203, 2400609, 7201827, 21605481]

約数ペア:

[(1, 21605481), (3, 7201827), (9, 2400609), (27, 800203), (31, 696951), (83, 260307), (93, 232317), (249, 86769), (279, 77439), (311, 69471), (747, 28923), (837, 25813), (933, 23157), (2241, 9641), (2573, 8397), (2799, 7719)]