21491558

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{13759}}^1$

素因数の和:13843

約数の個数: 16

約数和(自身を含む): 35665920

約数和(自身を除く): 14174362

約数列:

[1, 2, 11, 22, 71, 142, 781, 1562, 13759, 27518, 151349, 302698, 976889, 1953778, 10745779, 21491558]

約数ペア:

[(1, 21491558), (2, 10745779), (11, 1953778), (22, 976889), (71, 302698), (142, 151349), (781, 27518), (1562, 13759)]