20440400

素因数分解:

$2^4\times 5^2\times {\mathrm{137}}^1\times {\mathrm{373}}^1$

素因数の和:528

約数の個数: 60

約数和(自身を含む): 49599132

約数和(自身を除く): 29158732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 137, 200, 274, 373, 400, 548, 685, 746, 1096, 1370, 1492, 1865, 2192, 2740, 2984, 3425, 3730, 5480, 5968, 6850, 7460, 9325, 10960, 13700, 14920, 18650, 27400, 29840, 37300, 51101, 54800, 74600, 102202, 149200, 204404, 255505, 408808, 511010, 817616, 1022020, 1277525, 2044040, 2555050, 4088080, 5110100, 10220200, 20440400]

約数ペア:

[(1, 20440400), (2, 10220200), (4, 5110100), (5, 4088080), (8, 2555050), (10, 2044040), (16, 1277525), (20, 1022020), (25, 817616), (40, 511010), (50, 408808), (80, 255505), (100, 204404), (137, 149200), (200, 102202), (274, 74600), (373, 54800), (400, 51101), (548, 37300), (685, 29840), (746, 27400), (1096, 18650), (1370, 14920), (1492, 13700), (1865, 10960), (2192, 9325), (2740, 7460), (2984, 6850), (3425, 5968), (3730, 5480)]