21048990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:317

約数の個数: 64

約数和(自身を含む): 52557120

約数和(自身を除く): 31508130

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 41, 82, 109, 123, 157, 205, 218, 246, 314, 327, 410, 471, 545, 615, 654, 785, 942, 1090, 1230, 1570, 1635, 2355, 3270, 4469, 4710, 6437, 8938, 12874, 13407, 17113, 19311, 22345, 26814, 32185, 34226, 38622, 44690, 51339, 64370, 67035, 85565, 96555, 102678, 134070, 171130, 193110, 256695, 513390, 701633, 1403266, 2104899, 3508165, 4209798, 7016330, 10524495, 21048990]

約数ペア:

[(1, 21048990), (2, 10524495), (3, 7016330), (5, 4209798), (6, 3508165), (10, 2104899), (15, 1403266), (30, 701633), (41, 513390), (82, 256695), (109, 193110), (123, 171130), (157, 134070), (205, 102678), (218, 96555), (246, 85565), (314, 67035), (327, 64370), (410, 51339), (471, 44690), (545, 38622), (615, 34226), (654, 32185), (785, 26814), (942, 22345), (1090, 19311), (1230, 17113), (1570, 13407), (1635, 12874), (2355, 8938), (3270, 6437), (4469, 4710)]