21479500

素因数分解:

$2^2\times 5^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2$

素因数の和:81

約数の個数: 144

約数和(自身を含む): 59911488

約数和(自身を除く): 38431988

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 19, 20, 25, 28, 34, 35, 38, 50, 68, 70, 76, 85, 95, 100, 119, 125, 133, 140, 170, 175, 190, 238, 250, 266, 323, 340, 350, 361, 380, 425, 475, 476, 500, 532, 595, 646, 665, 700, 722, 850, 875, 950, 1190, 1292, 1330, 1444, 1615, 1700, 1750, 1805, 1900, 2125, 2261, 2375, 2380, 2527, 2660, 2975, 3230, 3325, 3500, 3610, 4250, 4522, 4750, 5054, 5950, 6137, 6460, 6650, 7220, 8075, 8500, 9025, 9044, 9500, 10108, 11305, 11900, 12274, 12635, 13300, 14875, 16150, 16625, 18050, 22610, 24548, 25270, 29750, 30685, 32300, 33250, 36100, 40375, 42959, 45125, 45220, 50540, 56525, 59500, 61370, 63175, 66500, 80750, 85918, 90250, 113050, 122740, 126350, 153425, 161500, 171836, 180500, 214795, 226100, 252700, 282625, 306850, 315875, 429590, 565250, 613700, 631750, 767125, 859180, 1073975, 1130500, 1263500, 1534250, 2147950, 3068500, 4295900, 5369875, 10739750, 21479500]

約数ペア:

[(1, 21479500), (2, 10739750), (4, 5369875), (5, 4295900), (7, 3068500), (10, 2147950), (14, 1534250), (17, 1263500), (19, 1130500), (20, 1073975), (25, 859180), (28, 767125), (34, 631750), (35, 613700), (38, 565250), (50, 429590), (68, 315875), (70, 306850), (76, 282625), (85, 252700), (95, 226100), (100, 214795), (119, 180500), (125, 171836), (133, 161500), (140, 153425), (170, 126350), (175, 122740), (190, 113050), (238, 90250), (250, 85918), (266, 80750), (323, 66500), (340, 63175), (350, 61370), (361, 59500), (380, 56525), (425, 50540), (475, 45220), (476, 45125), (500, 42959), (532, 40375), (595, 36100), (646, 33250), (665, 32300), (700, 30685), (722, 29750), (850, 25270), (875, 24548), (950, 22610), (1190, 18050), (1292, 16625), (1330, 16150), (1444, 14875), (1615, 13300), (1700, 12635), (1750, 12274), (1805, 11900), (1900, 11305), (2125, 10108), (2261, 9500), (2375, 9044), (2380, 9025), (2527, 8500), (2660, 8075), (2975, 7220), (3230, 6650), (3325, 6460), (3500, 6137), (3610, 5950), (4250, 5054), (4522, 4750)]