20831811

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{991}}^1$

素因数の和:1032

約数の個数: 48

約数和(自身を含む): 37997568

約数和(自身を除く): 17165757

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 49, 77, 91, 143, 147, 231, 273, 429, 539, 637, 991, 1001, 1617, 1911, 2973, 3003, 6937, 7007, 10901, 12883, 20811, 21021, 32703, 38649, 48559, 76307, 90181, 141713, 145677, 228921, 270543, 425139, 534149, 631267, 991991, 1602447, 1893801, 2975973, 6943937, 20831811]

約数ペア:

[(1, 20831811), (3, 6943937), (7, 2975973), (11, 1893801), (13, 1602447), (21, 991991), (33, 631267), (39, 534149), (49, 425139), (77, 270543), (91, 228921), (143, 145677), (147, 141713), (231, 90181), (273, 76307), (429, 48559), (539, 38649), (637, 32703), (991, 21021), (1001, 20811), (1617, 12883), (1911, 10901), (2973, 7007), (3003, 6937)]