21687993

素因数分解:

$3^5\times {\mathrm{149}}^1\times {\mathrm{599}}^1$

素因数の和:763

約数の個数: 24

約数和(自身を含む): 32760000

約数和(自身を除く): 11072007

約数列:

[1, 3, 9, 27, 81, 149, 243, 447, 599, 1341, 1797, 4023, 5391, 12069, 16173, 36207, 48519, 89251, 145557, 267753, 803259, 2409777, 7229331, 21687993]

約数ペア:

[(1, 21687993), (3, 7229331), (9, 2409777), (27, 803259), (81, 267753), (149, 145557), (243, 89251), (447, 48519), (599, 36207), (1341, 16173), (1797, 12069), (4023, 5391)]