21230128

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{32363}}^1$

素因数の和:32412

約数の個数: 20

約数和(自身を含む): 42137928

約数和(自身を除く): 20907800

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 32363, 64726, 129452, 258904, 517808, 1326883, 2653766, 5307532, 10615064, 21230128]

約数ペア:

[(1, 21230128), (2, 10615064), (4, 5307532), (8, 2653766), (16, 1326883), (41, 517808), (82, 258904), (164, 129452), (328, 64726), (656, 32363)]