20685424

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:349

約数の個数: 40

約数和(自身を含む): 41247360

約数和(自身を除く): 20561936

約数列:

[1, 2, 4, 8, 16, 71, 131, 139, 142, 262, 278, 284, 524, 556, 568, 1048, 1112, 1136, 2096, 2224, 9301, 9869, 18209, 18602, 19738, 36418, 37204, 39476, 72836, 74408, 78952, 145672, 148816, 157904, 291344, 1292839, 2585678, 5171356, 10342712, 20685424]

約数ペア:

[(1, 20685424), (2, 10342712), (4, 5171356), (8, 2585678), (16, 1292839), (71, 291344), (131, 157904), (139, 148816), (142, 145672), (262, 78952), (278, 74408), (284, 72836), (524, 39476), (556, 37204), (568, 36418), (1048, 19738), (1112, 18602), (1136, 18209), (2096, 9869), (2224, 9301)]