21316477

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{487}}^1$

素因数の和:557

約数の個数: 24

約数和(自身を含む): 27148416

約数和(自身を除く): 5831939

約数列:

[1, 7, 13, 37, 91, 169, 259, 481, 487, 1183, 3367, 3409, 6253, 6331, 18019, 43771, 44317, 82303, 126133, 234247, 576121, 1639729, 3045211, 21316477]

約数ペア:

[(1, 21316477), (7, 3045211), (13, 1639729), (37, 576121), (91, 234247), (169, 126133), (259, 82303), (481, 44317), (487, 43771), (1183, 18019), (3367, 6331), (3409, 6253)]