21378609

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5563}}^1$

素因数の和:5637

約数の個数: 24

約数和(自身を含む): 35876672

約数和(自身を除く): 14498063

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5563, 16689, 38941, 50067, 116823, 339343, 350469, 1018029, 2375401, 3054087, 7126203, 21378609]

約数ペア:

[(1, 21378609), (3, 7126203), (7, 3054087), (9, 2375401), (21, 1018029), (61, 350469), (63, 339343), (183, 116823), (427, 50067), (549, 38941), (1281, 16689), (3843, 5563)]