21087530

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{2707}}^1$

素因数の和:2774

約数の個数: 32

約数和(自身を含む): 40944960

約数和(自身を除く): 19857430

約数列:

[1, 2, 5, 10, 19, 38, 41, 82, 95, 190, 205, 410, 779, 1558, 2707, 3895, 5414, 7790, 13535, 27070, 51433, 102866, 110987, 221974, 257165, 514330, 554935, 1109870, 2108753, 4217506, 10543765, 21087530]

約数ペア:

[(1, 21087530), (2, 10543765), (5, 4217506), (10, 2108753), (19, 1109870), (38, 554935), (41, 514330), (82, 257165), (95, 221974), (190, 110987), (205, 102866), (410, 51433), (779, 27070), (1558, 13535), (2707, 7790), (3895, 5414)]