21784400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{4951}}^1$

素因数の和:4980

約数の個数: 60

約数和(自身を含む): 57106464

約数和(自身を除く): 35322064

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 176, 200, 220, 275, 400, 440, 550, 880, 1100, 2200, 4400, 4951, 9902, 19804, 24755, 39608, 49510, 54461, 79216, 99020, 108922, 123775, 198040, 217844, 247550, 272305, 396080, 435688, 495100, 544610, 871376, 990200, 1089220, 1361525, 1980400, 2178440, 2723050, 4356880, 5446100, 10892200, 21784400]

約数ペア:

[(1, 21784400), (2, 10892200), (4, 5446100), (5, 4356880), (8, 2723050), (10, 2178440), (11, 1980400), (16, 1361525), (20, 1089220), (22, 990200), (25, 871376), (40, 544610), (44, 495100), (50, 435688), (55, 396080), (80, 272305), (88, 247550), (100, 217844), (110, 198040), (176, 123775), (200, 108922), (220, 99020), (275, 79216), (400, 54461), (440, 49510), (550, 39608), (880, 24755), (1100, 19804), (2200, 9902), (4400, 4951)]