21321868

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{193}}^1\times {\mathrm{389}}^1$

素因数の和:657

約数の個数: 24

約数和(自身を含む): 38132640

約数和(自身を除く): 16810772

約数列:

[1, 2, 4, 71, 142, 193, 284, 386, 389, 772, 778, 1556, 13703, 27406, 27619, 54812, 55238, 75077, 110476, 150154, 300308, 5330467, 10660934, 21321868]

約数ペア:

[(1, 21321868), (2, 10660934), (4, 5330467), (71, 300308), (142, 150154), (193, 110476), (284, 75077), (386, 55238), (389, 54812), (772, 27619), (778, 27406), (1556, 13703)]