19721240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{337}}^1$

素因数の和:385

約数の個数: 128

約数和(自身を含む): 58406400

約数和(自身を除く): 38685160

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 19, 20, 22, 28, 35, 38, 40, 44, 55, 56, 70, 76, 77, 88, 95, 110, 133, 140, 152, 154, 190, 209, 220, 266, 280, 308, 337, 380, 385, 418, 440, 532, 616, 665, 674, 760, 770, 836, 1045, 1064, 1330, 1348, 1463, 1540, 1672, 1685, 2090, 2359, 2660, 2696, 2926, 3080, 3370, 3707, 4180, 4718, 5320, 5852, 6403, 6740, 7315, 7414, 8360, 9436, 11704, 11795, 12806, 13480, 14630, 14828, 18535, 18872, 23590, 25612, 25949, 29260, 29656, 32015, 37070, 44821, 47180, 51224, 51898, 58520, 64030, 70433, 74140, 89642, 94360, 103796, 128060, 129745, 140866, 148280, 179284, 207592, 224105, 256120, 259490, 281732, 352165, 358568, 448210, 493031, 518980, 563464, 704330, 896420, 986062, 1037960, 1408660, 1792840, 1972124, 2465155, 2817320, 3944248, 4930310, 9860620, 19721240]

約数ペア:

[(1, 19721240), (2, 9860620), (4, 4930310), (5, 3944248), (7, 2817320), (8, 2465155), (10, 1972124), (11, 1792840), (14, 1408660), (19, 1037960), (20, 986062), (22, 896420), (28, 704330), (35, 563464), (38, 518980), (40, 493031), (44, 448210), (55, 358568), (56, 352165), (70, 281732), (76, 259490), (77, 256120), (88, 224105), (95, 207592), (110, 179284), (133, 148280), (140, 140866), (152, 129745), (154, 128060), (190, 103796), (209, 94360), (220, 89642), (266, 74140), (280, 70433), (308, 64030), (337, 58520), (380, 51898), (385, 51224), (418, 47180), (440, 44821), (532, 37070), (616, 32015), (665, 29656), (674, 29260), (760, 25949), (770, 25612), (836, 23590), (1045, 18872), (1064, 18535), (1330, 14828), (1348, 14630), (1463, 13480), (1540, 12806), (1672, 11795), (1685, 11704), (2090, 9436), (2359, 8360), (2660, 7414), (2696, 7315), (2926, 6740), (3080, 6403), (3370, 5852), (3707, 5320), (4180, 4718)]