28012855

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{251}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 38864448

約数和(自身を除く): 10851593

約数列:

[1, 5, 13, 17, 65, 85, 101, 221, 251, 505, 1105, 1255, 1313, 1717, 3263, 4267, 6565, 8585, 16315, 21335, 22321, 25351, 55471, 111605, 126755, 277355, 329563, 430967, 1647815, 2154835, 5602571, 28012855]

約数ペア:

[(1, 28012855), (5, 5602571), (13, 2154835), (17, 1647815), (65, 430967), (85, 329563), (101, 277355), (221, 126755), (251, 111605), (505, 55471), (1105, 25351), (1255, 22321), (1313, 21335), (1717, 16315), (3263, 8585), (4267, 6565)]