20977880

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{139}}^1$

素因数の和:182

約数の個数: 128

約数和(自身を含む): 60480000

約数和(自身を除く): 39502120

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 98, 110, 139, 140, 154, 196, 220, 245, 278, 280, 308, 343, 385, 392, 440, 490, 539, 556, 616, 686, 695, 770, 973, 980, 1078, 1112, 1372, 1390, 1529, 1540, 1715, 1946, 1960, 2156, 2695, 2744, 2780, 3058, 3080, 3430, 3773, 3892, 4312, 4865, 5390, 5560, 6116, 6811, 6860, 7546, 7645, 7784, 9730, 10703, 10780, 12232, 13622, 13720, 15092, 15290, 18865, 19460, 21406, 21560, 27244, 30184, 30580, 34055, 37730, 38920, 42812, 47677, 53515, 54488, 61160, 68110, 74921, 75460, 85624, 95354, 107030, 136220, 149842, 150920, 190708, 214060, 238385, 272440, 299684, 374605, 381416, 428120, 476770, 524447, 599368, 749210, 953540, 1048894, 1498420, 1907080, 2097788, 2622235, 2996840, 4195576, 5244470, 10488940, 20977880]

約数ペア:

[(1, 20977880), (2, 10488940), (4, 5244470), (5, 4195576), (7, 2996840), (8, 2622235), (10, 2097788), (11, 1907080), (14, 1498420), (20, 1048894), (22, 953540), (28, 749210), (35, 599368), (40, 524447), (44, 476770), (49, 428120), (55, 381416), (56, 374605), (70, 299684), (77, 272440), (88, 238385), (98, 214060), (110, 190708), (139, 150920), (140, 149842), (154, 136220), (196, 107030), (220, 95354), (245, 85624), (278, 75460), (280, 74921), (308, 68110), (343, 61160), (385, 54488), (392, 53515), (440, 47677), (490, 42812), (539, 38920), (556, 37730), (616, 34055), (686, 30580), (695, 30184), (770, 27244), (973, 21560), (980, 21406), (1078, 19460), (1112, 18865), (1372, 15290), (1390, 15092), (1529, 13720), (1540, 13622), (1715, 12232), (1946, 10780), (1960, 10703), (2156, 9730), (2695, 7784), (2744, 7645), (2780, 7546), (3058, 6860), (3080, 6811), (3430, 6116), (3773, 5560), (3892, 5390), (4312, 4865)]