21000815444

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{97}}^1\times {\mathrm{21419}}^1$

素因数の和:21565

約数の個数: 72

約数和(自身を含む): 44787677760

約数和(自身を除く): 23786862316

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 97, 133, 194, 266, 361, 388, 532, 679, 722, 1358, 1444, 1843, 2527, 2716, 3686, 5054, 7372, 10108, 12901, 21419, 25802, 35017, 42838, 51604, 70034, 85676, 140068, 149933, 245119, 299866, 406961, 490238, 599732, 813922, 980476, 1627844, 2077643, 2848727, 4155286, 5697454, 7732259, 8310572, 11394908, 14543501, 15464518, 29087002, 30929036, 39475217, 54125813, 58174004, 78950434, 108251626, 157900868, 216503252, 276326519, 552653038, 750029123, 1105306076, 1500058246, 3000116492, 5250203861, 10500407722, 21000815444]

約数ペア:

[(1, 21000815444), (2, 10500407722), (4, 5250203861), (7, 3000116492), (14, 1500058246), (19, 1105306076), (28, 750029123), (38, 552653038), (76, 276326519), (97, 216503252), (133, 157900868), (194, 108251626), (266, 78950434), (361, 58174004), (388, 54125813), (532, 39475217), (679, 30929036), (722, 29087002), (1358, 15464518), (1444, 14543501), (1843, 11394908), (2527, 8310572), (2716, 7732259), (3686, 5697454), (5054, 4155286), (7372, 2848727), (10108, 2077643), (12901, 1627844), (21419, 980476), (25802, 813922), (35017, 599732), (42838, 490238), (51604, 406961), (70034, 299866), (85676, 245119), (140068, 149933)]