21031816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{4703}}^1$

素因数の和:4765

約数の個数: 32

約数和(自身を含む): 43464960

約数和(自身を除く): 22433144

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 172, 344, 559, 1118, 2236, 4472, 4703, 9406, 18812, 37624, 61139, 122278, 202229, 244556, 404458, 489112, 808916, 1617832, 2628977, 5257954, 10515908, 21031816]

約数ペア:

[(1, 21031816), (2, 10515908), (4, 5257954), (8, 2628977), (13, 1617832), (26, 808916), (43, 489112), (52, 404458), (86, 244556), (104, 202229), (172, 122278), (344, 61139), (559, 37624), (1118, 18812), (2236, 9406), (4472, 4703)]