21054115

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{3313}}^1$

素因数の和:3390

約数の個数: 16

約数和(自身を含む): 26724096

約数和(自身を除く): 5669981

約数列:

[1, 5, 31, 41, 155, 205, 1271, 3313, 6355, 16565, 102703, 135833, 513515, 679165, 4210823, 21054115]

約数ペア:

[(1, 21054115), (5, 4210823), (31, 679165), (41, 513515), (155, 135833), (205, 102703), (1271, 16565), (3313, 6355)]