21213616

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{349}}^1$

素因数の和:517

約数の個数: 40

約数和(自身を含む): 42966000

約数和(自身を除く): 21752384

約数列:

[1, 2, 4, 8, 16, 29, 58, 116, 131, 232, 262, 349, 464, 524, 698, 1048, 1396, 2096, 2792, 3799, 5584, 7598, 10121, 15196, 20242, 30392, 40484, 45719, 60784, 80968, 91438, 161936, 182876, 365752, 731504, 1325851, 2651702, 5303404, 10606808, 21213616]

約数ペア:

[(1, 21213616), (2, 10606808), (4, 5303404), (8, 2651702), (16, 1325851), (29, 731504), (58, 365752), (116, 182876), (131, 161936), (232, 91438), (262, 80968), (349, 60784), (464, 45719), (524, 40484), (698, 30392), (1048, 20242), (1396, 15196), (2096, 10121), (2792, 7598), (3799, 5584)]