21921080

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{2293}}^1$

素因数の和:2543

約数の個数: 32

約数和(自身を含む): 49550400

約数和(自身を除く): 27629320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2293, 2390, 4586, 4780, 9172, 9560, 11465, 18344, 22930, 45860, 91720, 548027, 1096054, 2192108, 2740135, 4384216, 5480270, 10960540, 21921080]

約数ペア:

[(1, 21921080), (2, 10960540), (4, 5480270), (5, 4384216), (8, 2740135), (10, 2192108), (20, 1096054), (40, 548027), (239, 91720), (478, 45860), (956, 22930), (1195, 18344), (1912, 11465), (2293, 9560), (2390, 9172), (4586, 4780)]