20821493

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{2393}}^1$

素因数の和:2524

約数の個数: 16

約数和(自身を含む): 26199936

約数和(自身を除く): 5378443

約数列:

[1, 7, 11, 77, 113, 791, 1243, 2393, 8701, 16751, 26323, 184261, 270409, 1892863, 2974499, 20821493]

約数ペア:

[(1, 20821493), (7, 2974499), (11, 1892863), (77, 270409), (113, 184261), (791, 26323), (1243, 16751), (2393, 8701)]