21755864

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3947}}^1$

素因数の和:4019

約数の個数: 32

約数和(自身を含む): 44770320

約数和(自身を除く): 23014456

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 212, 424, 689, 1378, 2756, 3947, 5512, 7894, 15788, 31576, 51311, 102622, 205244, 209191, 410488, 418382, 836764, 1673528, 2719483, 5438966, 10877932, 21755864]

約数ペア:

[(1, 21755864), (2, 10877932), (4, 5438966), (8, 2719483), (13, 1673528), (26, 836764), (52, 418382), (53, 410488), (104, 209191), (106, 205244), (212, 102622), (424, 51311), (689, 31576), (1378, 15788), (2756, 7894), (3947, 5512)]