20210931

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{811}}^1$

素因数の和:904

約数の個数: 32

約数和(自身を含む): 32739840

約数和(自身を除く): 12528909

約数列:

[1, 3, 9, 13, 27, 39, 71, 117, 213, 351, 639, 811, 923, 1917, 2433, 2769, 7299, 8307, 10543, 21897, 24921, 31629, 57581, 94887, 172743, 284661, 518229, 748553, 1554687, 2245659, 6736977, 20210931]

約数ペア:

[(1, 20210931), (3, 6736977), (9, 2245659), (13, 1554687), (27, 748553), (39, 518229), (71, 284661), (117, 172743), (213, 94887), (351, 57581), (639, 31629), (811, 24921), (923, 21897), (1917, 10543), (2433, 8307), (2769, 7299)]