21197187

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{479}}^1$

素因数の和:648

約数の個数: 32

約数和(自身を含む): 34560000

約数和(自身を除く): 13362813

約数列:

[1, 3, 9, 11, 27, 33, 99, 149, 297, 447, 479, 1341, 1437, 1639, 4023, 4311, 4917, 5269, 12933, 14751, 15807, 44253, 47421, 71371, 142263, 214113, 642339, 785081, 1927017, 2355243, 7065729, 21197187]

約数ペア:

[(1, 21197187), (3, 7065729), (9, 2355243), (11, 1927017), (27, 785081), (33, 642339), (99, 214113), (149, 142263), (297, 71371), (447, 47421), (479, 44253), (1341, 15807), (1437, 14751), (1639, 12933), (4023, 5269), (4311, 4917)]