21152678

素因数分解:

$2^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1\times {\mathrm{1451}}^1$

素因数の和:1687

約数の個数: 16

約数和(自身を含む): 32774544

約数和(自身を除く): 11621866

約数列:

[1, 2, 37, 74, 197, 394, 1451, 2902, 7289, 14578, 53687, 107374, 285847, 571694, 10576339, 21152678]

約数ペア:

[(1, 21152678), (2, 10576339), (37, 571694), (74, 285847), (197, 107374), (394, 53687), (1451, 14578), (2902, 7289)]