21057556

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{13063}}^1$

素因数の和:13111

約数の個数: 24

約数和(自身を含む): 40968704

約数和(自身を除く): 19911148

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 124, 403, 806, 1612, 13063, 26126, 52252, 169819, 339638, 404953, 679276, 809906, 1619812, 5264389, 10528778, 21057556]

約数ペア:

[(1, 21057556), (2, 10528778), (4, 5264389), (13, 1619812), (26, 809906), (31, 679276), (52, 404953), (62, 339638), (124, 169819), (403, 52252), (806, 26126), (1612, 13063)]