198804520

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{25229}}^1$

素因数の和:25437

約数の個数: 32

約数和(自身を含む): 449598600

約数和(自身を除く): 250794080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 25229, 50458, 100916, 126145, 201832, 252290, 504580, 1009160, 4970113, 9940226, 19880452, 24850565, 39760904, 49701130, 99402260, 198804520]

約数ペア:

[(1, 198804520), (2, 99402260), (4, 49701130), (5, 39760904), (8, 24850565), (10, 19880452), (20, 9940226), (40, 4970113), (197, 1009160), (394, 504580), (788, 252290), (985, 201832), (1576, 126145), (1970, 100916), (3940, 50458), (7880, 25229)]