21956390

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{21739}}^1$

素因数の和:21847

約数の個数: 16

約数和(自身を含む): 39914640

約数和(自身を除く): 17958250

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 21739, 43478, 108695, 217390, 2195639, 4391278, 10978195, 21956390]

約数ペア:

[(1, 21956390), (2, 10978195), (5, 4391278), (10, 2195639), (101, 217390), (202, 108695), (505, 43478), (1010, 21739)]