8157681

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4177}}^1$

素因数の和:4221

約数の個数: 24

約数和(自身を含む): 13904384

約数和(自身を除く): 5746703

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 4177, 12531, 29239, 37593, 87717, 129487, 263151, 388461, 906409, 1165383, 2719227, 8157681]

約数ペア:

[(1, 8157681), (3, 2719227), (7, 1165383), (9, 906409), (21, 388461), (31, 263151), (63, 129487), (93, 87717), (217, 37593), (279, 29239), (651, 12531), (1953, 4177)]