21550869

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{233}}^1\times {\mathrm{239}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 32123520

約数和(自身を除く): 10572651

約数列:

[1, 3, 9, 43, 129, 233, 239, 387, 699, 717, 2097, 2151, 10019, 10277, 30057, 30831, 55687, 90171, 92493, 167061, 501183, 2394541, 7183623, 21550869]

約数ペア:

[(1, 21550869), (3, 7183623), (9, 2394541), (43, 501183), (129, 167061), (233, 92493), (239, 90171), (387, 55687), (699, 30831), (717, 30057), (2097, 10277), (2151, 10019)]