217638538

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{20771}}^1$

素因数の和:20830

約数の個数: 24

約数和(自身を含む): 364922496

約数和(自身を除く): 147283958

約数列:

[1, 2, 13, 26, 31, 62, 169, 338, 403, 806, 5239, 10478, 20771, 41542, 270023, 540046, 643901, 1287802, 3510299, 7020598, 8370713, 16741426, 108819269, 217638538]

約数ペア:

[(1, 217638538), (2, 108819269), (13, 16741426), (26, 8370713), (31, 7020598), (62, 3510299), (169, 1287802), (338, 643901), (403, 540046), (806, 270023), (5239, 41542), (10478, 20771)]