21480571

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{241}}^1$

素因数の和:379

約数の個数: 24

約数和(自身を含む): 26815536

約数和(自身を除く): 5334965

約数列:

[1, 7, 17, 49, 107, 119, 241, 749, 833, 1687, 1819, 4097, 5243, 11809, 12733, 25787, 28679, 89131, 180509, 200753, 438379, 1263563, 3068653, 21480571]

約数ペア:

[(1, 21480571), (7, 3068653), (17, 1263563), (49, 438379), (107, 200753), (119, 180509), (241, 89131), (749, 28679), (833, 25787), (1687, 12733), (1819, 11809), (4097, 5243)]