19953780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{617}}^1$

素因数の和:654

約数の個数: 144

約数和(自身を含む): 71015616

約数和(自身を除く): 51061836

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 49, 55, 60, 66, 70, 77, 84, 98, 105, 110, 132, 140, 147, 154, 165, 196, 210, 220, 231, 245, 294, 308, 330, 385, 420, 462, 490, 539, 588, 617, 660, 735, 770, 924, 980, 1078, 1155, 1234, 1470, 1540, 1617, 1851, 2156, 2310, 2468, 2695, 2940, 3085, 3234, 3702, 4319, 4620, 5390, 6170, 6468, 6787, 7404, 8085, 8638, 9255, 10780, 12340, 12957, 13574, 16170, 17276, 18510, 20361, 21595, 25914, 27148, 30233, 32340, 33935, 37020, 40722, 43190, 47509, 51828, 60466, 64785, 67870, 81444, 86380, 90699, 95018, 101805, 120932, 129570, 135740, 142527, 151165, 181398, 190036, 203610, 237545, 259140, 285054, 302330, 332563, 362796, 407220, 453495, 475090, 570108, 604660, 665126, 712635, 906990, 950180, 997689, 1330252, 1425270, 1662815, 1813980, 1995378, 2850540, 3325630, 3990756, 4988445, 6651260, 9976890, 19953780]

約数ペア:

[(1, 19953780), (2, 9976890), (3, 6651260), (4, 4988445), (5, 3990756), (6, 3325630), (7, 2850540), (10, 1995378), (11, 1813980), (12, 1662815), (14, 1425270), (15, 1330252), (20, 997689), (21, 950180), (22, 906990), (28, 712635), (30, 665126), (33, 604660), (35, 570108), (42, 475090), (44, 453495), (49, 407220), (55, 362796), (60, 332563), (66, 302330), (70, 285054), (77, 259140), (84, 237545), (98, 203610), (105, 190036), (110, 181398), (132, 151165), (140, 142527), (147, 135740), (154, 129570), (165, 120932), (196, 101805), (210, 95018), (220, 90699), (231, 86380), (245, 81444), (294, 67870), (308, 64785), (330, 60466), (385, 51828), (420, 47509), (462, 43190), (490, 40722), (539, 37020), (588, 33935), (617, 32340), (660, 30233), (735, 27148), (770, 25914), (924, 21595), (980, 20361), (1078, 18510), (1155, 17276), (1234, 16170), (1470, 13574), (1540, 12957), (1617, 12340), (1851, 10780), (2156, 9255), (2310, 8638), (2468, 8085), (2695, 7404), (2940, 6787), (3085, 6468), (3234, 6170), (3702, 5390), (4319, 4620)]