21264940

素因数分解:

$2^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{4643}}^1$

素因数の和:4881

約数の個数: 24

約数和(自身を含む): 44861040

約数和(自身を除く): 23596100

約数列:

[1, 2, 4, 5, 10, 20, 229, 458, 916, 1145, 2290, 4580, 4643, 9286, 18572, 23215, 46430, 92860, 1063247, 2126494, 4252988, 5316235, 10632470, 21264940]

約数ペア:

[(1, 21264940), (2, 10632470), (4, 5316235), (5, 4252988), (10, 2126494), (20, 1063247), (229, 92860), (458, 46430), (916, 23215), (1145, 18572), (2290, 9286), (4580, 4643)]