21158739

素因数分解:

$3^5\times 7^2\times {\mathrm{1777}}^1$

素因数の和:1806

約数の個数: 36

約数和(自身を含む): 36889944

約数和(自身を除く): 15731205

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 243, 441, 567, 1323, 1701, 1777, 3969, 5331, 11907, 12439, 15993, 37317, 47979, 87073, 111951, 143937, 261219, 335853, 431811, 783657, 1007559, 2350971, 3022677, 7052913, 21158739]

約数ペア:

[(1, 21158739), (3, 7052913), (7, 3022677), (9, 2350971), (21, 1007559), (27, 783657), (49, 431811), (63, 335853), (81, 261219), (147, 143937), (189, 111951), (243, 87073), (441, 47979), (567, 37317), (1323, 15993), (1701, 12439), (1777, 11907), (3969, 5331)]