15681813

素因数分解:

$3^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{997}}^1$

素因数の和:1121

約数の個数: 24

約数和(自身を含む): 24574752

約数和(自身を除く): 8892939

約数列:

[1, 3, 7, 21, 49, 107, 147, 321, 749, 997, 2247, 2991, 5243, 6979, 15729, 20937, 48853, 106679, 146559, 320037, 746753, 2240259, 5227271, 15681813]

約数ペア:

[(1, 15681813), (3, 5227271), (7, 2240259), (21, 746753), (49, 320037), (107, 146559), (147, 106679), (321, 48853), (749, 20937), (997, 15729), (2247, 6979), (2991, 5243)]