21495551

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{2609}}^1$

素因数の和:2734

約数の個数: 16

約数和(自身を含む): 27060480

約数和(自身を除く): 5564929

約数列:

[1, 7, 11, 77, 107, 749, 1177, 2609, 8239, 18263, 28699, 200893, 279163, 1954141, 3070793, 21495551]

約数ペア:

[(1, 21495551), (7, 3070793), (11, 1954141), (77, 279163), (107, 200893), (749, 28699), (1177, 18263), (2609, 8239)]