81896980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{1949}}^1$

素因数の和:2160

約数の個数: 48

約数和(自身を含む): 188697600

約数和(自身を除く): 106800620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 764, 955, 1910, 1949, 2101, 3820, 3898, 4202, 7796, 8404, 9745, 10505, 19490, 21010, 21439, 38980, 42020, 42878, 85756, 107195, 214390, 372259, 428780, 744518, 1489036, 1861295, 3722590, 4094849, 7445180, 8189698, 16379396, 20474245, 40948490, 81896980]

約数ペア:

[(1, 81896980), (2, 40948490), (4, 20474245), (5, 16379396), (10, 8189698), (11, 7445180), (20, 4094849), (22, 3722590), (44, 1861295), (55, 1489036), (110, 744518), (191, 428780), (220, 372259), (382, 214390), (764, 107195), (955, 85756), (1910, 42878), (1949, 42020), (2101, 38980), (3820, 21439), (3898, 21010), (4202, 19490), (7796, 10505), (8404, 9745)]