21378292

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{7757}}^1$

素因数の和:7827

約数の個数: 24

約数和(自身を含む): 41055336

約数和(自身を除く): 19677044

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 212, 689, 1378, 2756, 7757, 15514, 31028, 100841, 201682, 403364, 411121, 822242, 1644484, 5344573, 10689146, 21378292]

約数ペア:

[(1, 21378292), (2, 10689146), (4, 5344573), (13, 1644484), (26, 822242), (52, 411121), (53, 403364), (106, 201682), (212, 100841), (689, 31028), (1378, 15514), (2756, 7757)]