20881259

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{2347}}^1$

素因数の和:2426

約数の個数: 16

約数和(自身を含む): 25245696

約数和(自身を除く): 4364437

約数列:

[1, 7, 31, 41, 217, 287, 1271, 2347, 8897, 16429, 72757, 96227, 509299, 673589, 2983037, 20881259]

約数ペア:

[(1, 20881259), (7, 2983037), (31, 673589), (41, 509299), (217, 96227), (287, 72757), (1271, 16429), (2347, 8897)]