20091031880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{72931}}^1$

素因数の和:73110

約数の個数: 64

約数和(自身を含む): 46314737280

約数和(自身を除く): 26223705400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 97, 142, 194, 284, 355, 388, 485, 568, 710, 776, 970, 1420, 1940, 2840, 3880, 6887, 13774, 27548, 34435, 55096, 68870, 72931, 137740, 145862, 275480, 291724, 364655, 583448, 729310, 1458620, 2917240, 5178101, 7074307, 10356202, 14148614, 20712404, 25890505, 28297228, 35371535, 41424808, 51781010, 56594456, 70743070, 103562020, 141486140, 207124040, 282972280, 502275797, 1004551594, 2009103188, 2511378985, 4018206376, 5022757970, 10045515940, 20091031880]

約数ペア:

[(1, 20091031880), (2, 10045515940), (4, 5022757970), (5, 4018206376), (8, 2511378985), (10, 2009103188), (20, 1004551594), (40, 502275797), (71, 282972280), (97, 207124040), (142, 141486140), (194, 103562020), (284, 70743070), (355, 56594456), (388, 51781010), (485, 41424808), (568, 35371535), (710, 28297228), (776, 25890505), (970, 20712404), (1420, 14148614), (1940, 10356202), (2840, 7074307), (3880, 5178101), (6887, 2917240), (13774, 1458620), (27548, 729310), (34435, 583448), (55096, 364655), (68870, 291724), (72931, 275480), (137740, 145862)]