18810988

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{1861}}^1$

素因数の和:1910

約数の個数: 36

約数和(自身を含む): 39727632

約数和(自身を除く): 20916644

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 361, 532, 722, 1444, 1861, 2527, 3722, 5054, 7444, 10108, 13027, 26054, 35359, 52108, 70718, 141436, 247513, 495026, 671821, 990052, 1343642, 2687284, 4702747, 9405494, 18810988]

約数ペア:

[(1, 18810988), (2, 9405494), (4, 4702747), (7, 2687284), (14, 1343642), (19, 990052), (28, 671821), (38, 495026), (76, 247513), (133, 141436), (266, 70718), (361, 52108), (532, 35359), (722, 26054), (1444, 13027), (1861, 10108), (2527, 7444), (3722, 5054)]