21140665

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{479}}^1$

素因数の和:601

約数の個数: 32

約数和(自身を含む): 31610880

約数和(自身を除く): 10470215

約数列:

[1, 5, 7, 13, 35, 65, 91, 97, 455, 479, 485, 679, 1261, 2395, 3353, 3395, 6227, 6305, 8827, 16765, 31135, 43589, 44135, 46463, 217945, 232315, 325241, 604019, 1626205, 3020095, 4228133, 21140665]

約数ペア:

[(1, 21140665), (5, 4228133), (7, 3020095), (13, 1626205), (35, 604019), (65, 325241), (91, 232315), (97, 217945), (455, 46463), (479, 44135), (485, 43589), (679, 31135), (1261, 16765), (2395, 8827), (3353, 6305), (3395, 6227)]