21037009

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{2593}}^1$

素因数の和:2680

約数の個数: 16

約数和(自身を含む): 25732480

約数和(自身を除く): 4695471

約数列:

[1, 7, 19, 61, 133, 427, 1159, 2593, 8113, 18151, 49267, 158173, 344869, 1107211, 3005287, 21037009]

約数ペア:

[(1, 21037009), (7, 3005287), (19, 1107211), (61, 344869), (133, 158173), (427, 49267), (1159, 18151), (2593, 8113)]