28057211

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{641}}^1$

素因数の和:711

約数の個数: 24

約数和(自身を含む): 35715744

約数和(自身を除く): 7658533

約数列:

[1, 7, 13, 37, 91, 169, 259, 481, 641, 1183, 3367, 4487, 6253, 8333, 23717, 43771, 58331, 108329, 166019, 308321, 758303, 2158247, 4008173, 28057211]

約数ペア:

[(1, 28057211), (7, 4008173), (13, 2158247), (37, 758303), (91, 308321), (169, 166019), (259, 108329), (481, 58331), (641, 43771), (1183, 23717), (3367, 8333), (4487, 6253)]