21069657

素因数分解:

$3^2\times 7^2\times {\mathrm{47777}}^1$

素因数の和:47797

約数の個数: 18

約数和(自身を含む): 35403498

約数和(自身を除く): 14333841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47777, 143331, 334439, 429993, 1003317, 2341073, 3009951, 7023219, 21069657]

約数ペア:

[(1, 21069657), (3, 7023219), (7, 3009951), (9, 2341073), (21, 1003317), (49, 429993), (63, 334439), (147, 143331), (441, 47777)]