21278950

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{5527}}^1$

素因数の和:5557

約数の個数: 48

約数和(自身を含む): 49353984

約数和(自身を除く): 28075034

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 25, 35, 50, 55, 70, 77, 110, 154, 175, 275, 350, 385, 550, 770, 1925, 3850, 5527, 11054, 27635, 38689, 55270, 60797, 77378, 121594, 138175, 193445, 276350, 303985, 386890, 425579, 607970, 851158, 967225, 1519925, 1934450, 2127895, 3039850, 4255790, 10639475, 21278950]

約数ペア:

[(1, 21278950), (2, 10639475), (5, 4255790), (7, 3039850), (10, 2127895), (11, 1934450), (14, 1519925), (22, 967225), (25, 851158), (35, 607970), (50, 425579), (55, 386890), (70, 303985), (77, 276350), (110, 193445), (154, 138175), (175, 121594), (275, 77378), (350, 60797), (385, 55270), (550, 38689), (770, 27635), (1925, 11054), (3850, 5527)]