21945021

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{19717}}^1$

素因数の和:19780

約数の個数: 16

約数和(自身を含む): 34072704

約数和(自身を除く): 12127683

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 19717, 59151, 138019, 414057, 1045001, 3135003, 7315007, 21945021]

約数ペア:

[(1, 21945021), (3, 7315007), (7, 3135003), (21, 1045001), (53, 414057), (159, 138019), (371, 59151), (1113, 19717)]