21449168

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1021}}^1$

素因数の和:1143

約数の個数: 40

約数和(自身を含む): 45241896

約数和(自身を除く): 23792728

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 101, 104, 202, 208, 404, 808, 1021, 1313, 1616, 2042, 2626, 4084, 5252, 8168, 10504, 13273, 16336, 21008, 26546, 53092, 103121, 106184, 206242, 212368, 412484, 824968, 1340573, 1649936, 2681146, 5362292, 10724584, 21449168]

約数ペア:

[(1, 21449168), (2, 10724584), (4, 5362292), (8, 2681146), (13, 1649936), (16, 1340573), (26, 824968), (52, 412484), (101, 212368), (104, 206242), (202, 106184), (208, 103121), (404, 53092), (808, 26546), (1021, 21008), (1313, 16336), (1616, 13273), (2042, 10504), (2626, 8168), (4084, 5252)]