19872990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{220811}}^1$

素因数の和:220824

約数の個数: 24

約数和(自身を含む): 51670008

約数和(自身を除く): 31797018

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 220811, 441622, 662433, 1104055, 1324866, 1987299, 2208110, 3312165, 3974598, 6624330, 9936495, 19872990]

約数ペア:

[(1, 19872990), (2, 9936495), (3, 6624330), (5, 3974598), (6, 3312165), (9, 2208110), (10, 1987299), (15, 1324866), (18, 1104055), (30, 662433), (45, 441622), (90, 220811)]