21871465

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{56809}}^1$

素因数の和:56832

約数の個数: 16

約数和(自身を含む): 32722560

約数和(自身を除く): 10851095

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 56809, 284045, 397663, 624899, 1988315, 3124495, 4374293, 21871465]

約数ペア:

[(1, 21871465), (5, 4374293), (7, 3124495), (11, 1988315), (35, 624899), (55, 397663), (77, 284045), (385, 56809)]