21677768

素因数分解:

$2^3\times 7^1\times {\mathrm{521}}^1\times {\mathrm{743}}^1$

素因数の和:1277

約数の個数: 32

約数和(自身を含む): 46604160

約数和(自身を除く): 24926392

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 521, 743, 1042, 1486, 2084, 2972, 3647, 4168, 5201, 5944, 7294, 10402, 14588, 20804, 29176, 41608, 387103, 774206, 1548412, 2709721, 3096824, 5419442, 10838884, 21677768]

約数ペア:

[(1, 21677768), (2, 10838884), (4, 5419442), (7, 3096824), (8, 2709721), (14, 1548412), (28, 774206), (56, 387103), (521, 41608), (743, 29176), (1042, 20804), (1486, 14588), (2084, 10402), (2972, 7294), (3647, 5944), (4168, 5201)]