21277809

素因数分解:

$3^5\times 7^2\times {\mathrm{1787}}^1$

素因数の和:1816

約数の個数: 36

約数和(自身を含む): 37097424

約数和(自身を除く): 15819615

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 243, 441, 567, 1323, 1701, 1787, 3969, 5361, 11907, 12509, 16083, 37527, 48249, 87563, 112581, 144747, 262689, 337743, 434241, 788067, 1013229, 2364201, 3039687, 7092603, 21277809]

約数ペア:

[(1, 21277809), (3, 7092603), (7, 3039687), (9, 2364201), (21, 1013229), (27, 788067), (49, 434241), (63, 337743), (81, 262689), (147, 144747), (189, 112581), (243, 87563), (441, 48249), (567, 37527), (1323, 16083), (1701, 12509), (1787, 11907), (3969, 5361)]