20992216

素因数分解:

$2^3\times 7^1\times {\mathrm{557}}^1\times {\mathrm{673}}^1$

素因数の和:1243

約数の個数: 32

約数和(自身を含む): 45131040

約数和(自身を除く): 24138824

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 557, 673, 1114, 1346, 2228, 2692, 3899, 4456, 4711, 5384, 7798, 9422, 15596, 18844, 31192, 37688, 374861, 749722, 1499444, 2624027, 2998888, 5248054, 10496108, 20992216]

約数ペア:

[(1, 20992216), (2, 10496108), (4, 5248054), (7, 2998888), (8, 2624027), (14, 1499444), (28, 749722), (56, 374861), (557, 37688), (673, 31192), (1114, 18844), (1346, 15596), (2228, 9422), (2692, 7798), (3899, 5384), (4456, 4711)]