21131872

素因数分解:

$2^5\times {\mathrm{71}}^2\times {\mathrm{131}}^1$

素因数の和:283

約数の個数: 36

約数和(自身を含む): 42519708

約数和(自身を除く): 21387836

約数列:

[1, 2, 4, 8, 16, 32, 71, 131, 142, 262, 284, 524, 568, 1048, 1136, 2096, 2272, 4192, 5041, 9301, 10082, 18602, 20164, 37204, 40328, 74408, 80656, 148816, 161312, 297632, 660371, 1320742, 2641484, 5282968, 10565936, 21131872]

約数ペア:

[(1, 21131872), (2, 10565936), (4, 5282968), (8, 2641484), (16, 1320742), (32, 660371), (71, 297632), (131, 161312), (142, 148816), (262, 80656), (284, 74408), (524, 40328), (568, 37204), (1048, 20164), (1136, 18602), (2096, 10082), (2272, 9301), (4192, 5041)]