21253804

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{509}}^1$

素因数の和:610

約数の個数: 48

約数和(自身を含む): 44382240

約数和(自身を除く): 23128436

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 73, 143, 146, 286, 292, 509, 572, 803, 949, 1018, 1606, 1898, 2036, 3212, 3796, 5599, 6617, 10439, 11198, 13234, 20878, 22396, 26468, 37157, 41756, 72787, 74314, 145574, 148628, 291148, 408727, 483041, 817454, 966082, 1634908, 1932164, 5313451, 10626902, 21253804]

約数ペア:

[(1, 21253804), (2, 10626902), (4, 5313451), (11, 1932164), (13, 1634908), (22, 966082), (26, 817454), (44, 483041), (52, 408727), (73, 291148), (143, 148628), (146, 145574), (286, 74314), (292, 72787), (509, 41756), (572, 37157), (803, 26468), (949, 22396), (1018, 20878), (1606, 13234), (1898, 11198), (2036, 10439), (3212, 6617), (3796, 5599)]