28207960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{64109}}^1$

素因数の和:64131

約数の個数: 32

約数和(自身を含む): 69238800

約数和(自身を除く): 41030840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 64109, 128218, 256436, 320545, 512872, 641090, 705199, 1282180, 1410398, 2564360, 2820796, 3525995, 5641592, 7051990, 14103980, 28207960]

約数ペア:

[(1, 28207960), (2, 14103980), (4, 7051990), (5, 5641592), (8, 3525995), (10, 2820796), (11, 2564360), (20, 1410398), (22, 1282180), (40, 705199), (44, 641090), (55, 512872), (88, 320545), (110, 256436), (220, 128218), (440, 64109)]