21488500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{3907}}^1$

素因数の和:3937

約数の個数: 48

約数和(自身を含む): 51210432

約数和(自身を除く): 29721932

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 125, 220, 250, 275, 500, 550, 1100, 1375, 2750, 3907, 5500, 7814, 15628, 19535, 39070, 42977, 78140, 85954, 97675, 171908, 195350, 214885, 390700, 429770, 488375, 859540, 976750, 1074425, 1953500, 2148850, 4297700, 5372125, 10744250, 21488500]

約数ペア:

[(1, 21488500), (2, 10744250), (4, 5372125), (5, 4297700), (10, 2148850), (11, 1953500), (20, 1074425), (22, 976750), (25, 859540), (44, 488375), (50, 429770), (55, 390700), (100, 214885), (110, 195350), (125, 171908), (220, 97675), (250, 85954), (275, 78140), (500, 42977), (550, 39070), (1100, 19535), (1375, 15628), (2750, 7814), (3907, 5500)]