21287992

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{5147}}^1$

素因数の和:5211

約数の個数: 32

約数和(自身を含む): 44478720

約数和(自身を除く): 23190728

約数列:

[1, 2, 4, 8, 11, 22, 44, 47, 88, 94, 188, 376, 517, 1034, 2068, 4136, 5147, 10294, 20588, 41176, 56617, 113234, 226468, 241909, 452936, 483818, 967636, 1935272, 2660999, 5321998, 10643996, 21287992]

約数ペア:

[(1, 21287992), (2, 10643996), (4, 5321998), (8, 2660999), (11, 1935272), (22, 967636), (44, 483818), (47, 452936), (88, 241909), (94, 226468), (188, 113234), (376, 56617), (517, 41176), (1034, 20588), (2068, 10294), (4136, 5147)]