21737709

素因数分解:

$3^2\times 7^1\times {\mathrm{389}}^1\times {\mathrm{887}}^1$

素因数の和:1289

約数の個数: 24

約数和(自身を含む): 36017280

約数和(自身を除く): 14279571

約数列:

[1, 3, 7, 9, 21, 63, 389, 887, 1167, 2661, 2723, 3501, 6209, 7983, 8169, 18627, 24507, 55881, 345043, 1035129, 2415301, 3105387, 7245903, 21737709]

約数ペア:

[(1, 21737709), (3, 7245903), (7, 3105387), (9, 2415301), (21, 1035129), (63, 345043), (389, 55881), (887, 24507), (1167, 18627), (2661, 8169), (2723, 7983), (3501, 6209)]