21425877

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{173}}^1$

素因数の和:335

約数の個数: 40

約数和(自身を含む): 35370720

約数和(自身を除く): 13944843

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 139, 173, 297, 417, 519, 891, 1251, 1529, 1557, 1903, 3753, 4587, 4671, 5709, 11259, 13761, 14013, 17127, 24047, 41283, 51381, 72141, 123849, 154143, 216423, 264517, 649269, 793551, 1947807, 2380653, 7141959, 21425877]

約数ペア:

[(1, 21425877), (3, 7141959), (9, 2380653), (11, 1947807), (27, 793551), (33, 649269), (81, 264517), (99, 216423), (139, 154143), (173, 123849), (297, 72141), (417, 51381), (519, 41283), (891, 24047), (1251, 17127), (1529, 14013), (1557, 13761), (1903, 11259), (3753, 5709), (4587, 4671)]