21777759

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{173}}^1\times {\mathrm{197}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 32247072

約数和(自身を除く): 10469313

約数列:

[1, 3, 9, 71, 173, 197, 213, 519, 591, 639, 1557, 1773, 12283, 13987, 34081, 36849, 41961, 102243, 110547, 125883, 306729, 2419751, 7259253, 21777759]

約数ペア:

[(1, 21777759), (3, 7259253), (9, 2419751), (71, 306729), (173, 125883), (197, 110547), (213, 102243), (519, 41961), (591, 36849), (639, 34081), (1557, 13987), (1773, 12283)]