18866980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{449}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 24678620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 449, 764, 898, 955, 1796, 1910, 2101, 2245, 3820, 4202, 4490, 4939, 8404, 8980, 9878, 10505, 19756, 21010, 24695, 42020, 49390, 85759, 98780, 171518, 343036, 428795, 857590, 943349, 1715180, 1886698, 3773396, 4716745, 9433490, 18866980]

約数ペア:

[(1, 18866980), (2, 9433490), (4, 4716745), (5, 3773396), (10, 1886698), (11, 1715180), (20, 943349), (22, 857590), (44, 428795), (55, 343036), (110, 171518), (191, 98780), (220, 85759), (382, 49390), (449, 42020), (764, 24695), (898, 21010), (955, 19756), (1796, 10505), (1910, 9878), (2101, 8980), (2245, 8404), (3820, 4939), (4202, 4490)]