18726820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:317

約数の個数: 72

約数和(自身を含む): 46453176

約数和(自身を除く): 27726356

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 97, 98, 140, 194, 196, 197, 245, 388, 394, 485, 490, 679, 788, 970, 980, 985, 1358, 1379, 1940, 1970, 2716, 2758, 3395, 3940, 4753, 5516, 6790, 6895, 9506, 9653, 13580, 13790, 19012, 19109, 19306, 23765, 27580, 38218, 38612, 47530, 48265, 76436, 95060, 95545, 96530, 133763, 191090, 193060, 267526, 382180, 535052, 668815, 936341, 1337630, 1872682, 2675260, 3745364, 4681705, 9363410, 18726820]

約数ペア:

[(1, 18726820), (2, 9363410), (4, 4681705), (5, 3745364), (7, 2675260), (10, 1872682), (14, 1337630), (20, 936341), (28, 668815), (35, 535052), (49, 382180), (70, 267526), (97, 193060), (98, 191090), (140, 133763), (194, 96530), (196, 95545), (197, 95060), (245, 76436), (388, 48265), (394, 47530), (485, 38612), (490, 38218), (679, 27580), (788, 23765), (970, 19306), (980, 19109), (985, 19012), (1358, 13790), (1379, 13580), (1940, 9653), (1970, 9506), (2716, 6895), (2758, 6790), (3395, 5516), (3940, 4753)]