21039856

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{18521}}^1$

素因数の和:18600

約数の個数: 20

約数和(自身を含む): 41341104

約数和(自身を除く): 20301248

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 18521, 37042, 74084, 148168, 296336, 1314991, 2629982, 5259964, 10519928, 21039856]

約数ペア:

[(1, 21039856), (2, 10519928), (4, 5259964), (8, 2629982), (16, 1314991), (71, 296336), (142, 148168), (284, 74084), (568, 37042), (1136, 18521)]