21440902

素因数分解:

$2^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{389}}^1$

素因数の和:556

約数の個数: 32

約数和(自身を含む): 38338560

約数和(自身を除く): 16897658

約数列:

[1, 2, 7, 14, 31, 62, 127, 217, 254, 389, 434, 778, 889, 1778, 2723, 3937, 5446, 7874, 12059, 24118, 27559, 49403, 55118, 84413, 98806, 168826, 345821, 691642, 1531493, 3062986, 10720451, 21440902]

約数ペア:

[(1, 21440902), (2, 10720451), (7, 3062986), (14, 1531493), (31, 691642), (62, 345821), (127, 168826), (217, 98806), (254, 84413), (389, 55118), (434, 49403), (778, 27559), (889, 24118), (1778, 12059), (2723, 7874), (3937, 5446)]