21221116

素因数分解:

$2^2\times 7^2\times {\mathrm{108271}}^1$

素因数の和:108289

約数の個数: 18

約数和(自身を含む): 43200528

約数和(自身を除く): 21979412

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 108271, 216542, 433084, 757897, 1515794, 3031588, 5305279, 10610558, 21221116]

約数ペア:

[(1, 21221116), (2, 10610558), (4, 5305279), (7, 3031588), (14, 1515794), (28, 757897), (49, 433084), (98, 216542), (196, 108271)]