21897911

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{659}}^1$

素因数の和:814

約数の個数: 16

約数和(自身を含む): 25850880

約数和(自身を除く): 3952969

約数列:

[1, 7, 47, 101, 329, 659, 707, 4613, 4747, 30973, 33229, 66559, 216811, 465913, 3128273, 21897911]

約数ペア:

[(1, 21897911), (7, 3128273), (47, 465913), (101, 216811), (329, 66559), (659, 33229), (707, 30973), (4613, 4747)]