21280376

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{2803}}^1$

素因数の和:2895

約数の個数: 32

約数和(自身を含む): 43574160

約数和(自身を除く): 22293784

約数列:

[1, 2, 4, 8, 13, 26, 52, 73, 104, 146, 292, 584, 949, 1898, 2803, 3796, 5606, 7592, 11212, 22424, 36439, 72878, 145756, 204619, 291512, 409238, 818476, 1636952, 2660047, 5320094, 10640188, 21280376]

約数ペア:

[(1, 21280376), (2, 10640188), (4, 5320094), (8, 2660047), (13, 1636952), (26, 818476), (52, 409238), (73, 291512), (104, 204619), (146, 145756), (292, 72878), (584, 36439), (949, 22424), (1898, 11212), (2803, 7592), (3796, 5606)]