21297800

素因数分解:

$2^3\times 5^2\times {\mathrm{83}}^1\times {\mathrm{1283}}^1$

素因数の和:1382

約数の個数: 48

約数和(自身を含む): 50153040

約数和(自身を除く): 28855240

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 83, 100, 166, 200, 332, 415, 664, 830, 1283, 1660, 2075, 2566, 3320, 4150, 5132, 6415, 8300, 10264, 12830, 16600, 25660, 32075, 51320, 64150, 106489, 128300, 212978, 256600, 425956, 532445, 851912, 1064890, 2129780, 2662225, 4259560, 5324450, 10648900, 21297800]

約数ペア:

[(1, 21297800), (2, 10648900), (4, 5324450), (5, 4259560), (8, 2662225), (10, 2129780), (20, 1064890), (25, 851912), (40, 532445), (50, 425956), (83, 256600), (100, 212978), (166, 128300), (200, 106489), (332, 64150), (415, 51320), (664, 32075), (830, 25660), (1283, 16600), (1660, 12830), (2075, 10264), (2566, 8300), (3320, 6415), (4150, 5132)]