20415780

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{491}}^1$

素因数の和:527

約数の個数: 192

約数和(自身を含む): 79349760

約数和(自身を除く): 58933980

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 27, 28, 30, 33, 35, 36, 42, 44, 45, 54, 55, 60, 63, 66, 70, 77, 84, 90, 99, 105, 108, 110, 126, 132, 135, 140, 154, 165, 180, 189, 198, 210, 220, 231, 252, 270, 297, 308, 315, 330, 378, 385, 396, 420, 462, 491, 495, 540, 594, 630, 660, 693, 756, 770, 924, 945, 982, 990, 1155, 1188, 1260, 1386, 1473, 1485, 1540, 1890, 1964, 1980, 2079, 2310, 2455, 2772, 2946, 2970, 3437, 3465, 3780, 4158, 4419, 4620, 4910, 5401, 5892, 5940, 6874, 6930, 7365, 8316, 8838, 9820, 10311, 10395, 10802, 13257, 13748, 13860, 14730, 16203, 17185, 17676, 20622, 20790, 21604, 22095, 26514, 27005, 29460, 30933, 32406, 34370, 37807, 41244, 41580, 44190, 48609, 51555, 53028, 54010, 61866, 64812, 66285, 68740, 75614, 81015, 88380, 92799, 97218, 103110, 108020, 113421, 123732, 132570, 145827, 151228, 154665, 162030, 185598, 189035, 194436, 206220, 226842, 243045, 265140, 291654, 309330, 324060, 340263, 371196, 378070, 453684, 463995, 486090, 567105, 583308, 618660, 680526, 729135, 756140, 927990, 972180, 1020789, 1134210, 1361052, 1458270, 1701315, 1855980, 2041578, 2268420, 2916540, 3402630, 4083156, 5103945, 6805260, 10207890, 20415780]

約数ペア:

[(1, 20415780), (2, 10207890), (3, 6805260), (4, 5103945), (5, 4083156), (6, 3402630), (7, 2916540), (9, 2268420), (10, 2041578), (11, 1855980), (12, 1701315), (14, 1458270), (15, 1361052), (18, 1134210), (20, 1020789), (21, 972180), (22, 927990), (27, 756140), (28, 729135), (30, 680526), (33, 618660), (35, 583308), (36, 567105), (42, 486090), (44, 463995), (45, 453684), (54, 378070), (55, 371196), (60, 340263), (63, 324060), (66, 309330), (70, 291654), (77, 265140), (84, 243045), (90, 226842), (99, 206220), (105, 194436), (108, 189035), (110, 185598), (126, 162030), (132, 154665), (135, 151228), (140, 145827), (154, 132570), (165, 123732), (180, 113421), (189, 108020), (198, 103110), (210, 97218), (220, 92799), (231, 88380), (252, 81015), (270, 75614), (297, 68740), (308, 66285), (315, 64812), (330, 61866), (378, 54010), (385, 53028), (396, 51555), (420, 48609), (462, 44190), (491, 41580), (495, 41244), (540, 37807), (594, 34370), (630, 32406), (660, 30933), (693, 29460), (756, 27005), (770, 26514), (924, 22095), (945, 21604), (982, 20790), (990, 20622), (1155, 17676), (1188, 17185), (1260, 16203), (1386, 14730), (1473, 13860), (1485, 13748), (1540, 13257), (1890, 10802), (1964, 10395), (1980, 10311), (2079, 9820), (2310, 8838), (2455, 8316), (2772, 7365), (2946, 6930), (2970, 6874), (3437, 5940), (3465, 5892), (3780, 5401), (4158, 4910), (4419, 4620)]