21052381

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{1049}}^1$

素因数の和:1164

約数の個数: 16

約数和(自身を含む): 24998400

約数和(自身を除く): 3946019

約数列:

[1, 7, 47, 61, 329, 427, 1049, 2867, 7343, 20069, 49303, 63989, 345121, 447923, 3007483, 21052381]

約数ペア:

[(1, 21052381), (7, 3007483), (47, 447923), (61, 345121), (329, 63989), (427, 49303), (1049, 20069), (2867, 7343)]