18986485

素因数分解:

$5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 27143424

約数和(自身を除く): 8156939

約数列:

[1, 5, 7, 35, 41, 101, 131, 205, 287, 505, 655, 707, 917, 1435, 3535, 4141, 4585, 5371, 13231, 20705, 26855, 28987, 37597, 66155, 92617, 144935, 187985, 463085, 542471, 2712355, 3797297, 18986485]

約数ペア:

[(1, 18986485), (5, 3797297), (7, 2712355), (35, 542471), (41, 463085), (101, 187985), (131, 144935), (205, 92617), (287, 66155), (505, 37597), (655, 28987), (707, 26855), (917, 20705), (1435, 13231), (3535, 5371), (4141, 4585)]