21279412

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{1171}}^1$

素因数の和:1252

約数の個数: 48

約数和(自身を含む): 47255040

約数和(自身を除く): 25975628

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 59, 77, 118, 154, 236, 308, 413, 649, 826, 1171, 1298, 1652, 2342, 2596, 4543, 4684, 8197, 9086, 12881, 16394, 18172, 25762, 32788, 51524, 69089, 90167, 138178, 180334, 276356, 360668, 483623, 759979, 967246, 1519958, 1934492, 3039916, 5319853, 10639706, 21279412]

約数ペア:

[(1, 21279412), (2, 10639706), (4, 5319853), (7, 3039916), (11, 1934492), (14, 1519958), (22, 967246), (28, 759979), (44, 483623), (59, 360668), (77, 276356), (118, 180334), (154, 138178), (236, 90167), (308, 69089), (413, 51524), (649, 32788), (826, 25762), (1171, 18172), (1298, 16394), (1652, 12881), (2342, 9086), (2596, 8197), (4543, 4684)]