80521780

素因数分解:

$2^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1\times {\mathrm{197}}^1$

素因数の和:504

約数の個数: 48

約数和(自身を含む): 172440576

約数和(自身を除く): 91918796

約数列:

[1, 2, 4, 5, 10, 20, 107, 191, 197, 214, 382, 394, 428, 535, 764, 788, 955, 985, 1070, 1910, 1970, 2140, 3820, 3940, 20437, 21079, 37627, 40874, 42158, 75254, 81748, 84316, 102185, 105395, 150508, 188135, 204370, 210790, 376270, 408740, 421580, 752540, 4026089, 8052178, 16104356, 20130445, 40260890, 80521780]

約数ペア:

[(1, 80521780), (2, 40260890), (4, 20130445), (5, 16104356), (10, 8052178), (20, 4026089), (107, 752540), (191, 421580), (197, 408740), (214, 376270), (382, 210790), (394, 204370), (428, 188135), (535, 150508), (764, 105395), (788, 102185), (955, 84316), (985, 81748), (1070, 75254), (1910, 42158), (1970, 40874), (2140, 37627), (3820, 21079), (3940, 20437)]