21286937

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{1213}}^1$

素因数の和:1352

約数の個数: 16

約数和(自身を含む): 25639680

約数和(自身を除く): 4352743

約数列:

[1, 7, 23, 109, 161, 763, 1213, 2507, 8491, 17549, 27899, 132217, 195293, 925519, 3040991, 21286937]

約数ペア:

[(1, 21286937), (7, 3040991), (23, 925519), (109, 195293), (161, 132217), (763, 27899), (1213, 17549), (2507, 8491)]