28780003

素因数分解:

$7^2\times {\mathrm{19}}^2\times {\mathrm{1627}}^1$

素因数の和:1679

約数の個数: 18

約数和(自身を含む): 35355276

約数和(自身を除く): 6575273

約数列:

[1, 7, 19, 49, 133, 361, 931, 1627, 2527, 11389, 17689, 30913, 79723, 216391, 587347, 1514737, 4111429, 28780003]

約数ペア:

[(1, 28780003), (7, 4111429), (19, 1514737), (49, 587347), (133, 216391), (361, 79723), (931, 30913), (1627, 17689), (2527, 11389)]