28271980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128509}}^1$

素因数の和:128529

約数の個数: 24

約数和(自身を含む): 64769040

約数和(自身を除く): 36497060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 128509, 257018, 514036, 642545, 1285090, 1413599, 2570180, 2827198, 5654396, 7067995, 14135990, 28271980]

約数ペア:

[(1, 28271980), (2, 14135990), (4, 7067995), (5, 5654396), (10, 2827198), (11, 2570180), (20, 1413599), (22, 1285090), (44, 642545), (55, 514036), (110, 257018), (220, 128509)]