21062740

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11833}}^1$

素因数の和:11931

約数の個数: 24

約数和(自身を含む): 44732520

約数和(自身を除く): 23669780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11833, 23666, 47332, 59165, 118330, 236660, 1053137, 2106274, 4212548, 5265685, 10531370, 21062740]

約数ペア:

[(1, 21062740), (2, 10531370), (4, 5265685), (5, 4212548), (10, 2106274), (20, 1053137), (89, 236660), (178, 118330), (356, 59165), (445, 47332), (890, 23666), (1780, 11833)]