21217140

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{1871}}^1$

素因数の和:1899

約数の個数: 120

約数和(自身を含む): 76108032

約数和(自身を除く): 54890892

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 210, 252, 270, 315, 324, 378, 405, 420, 540, 567, 630, 756, 810, 945, 1134, 1260, 1620, 1871, 1890, 2268, 2835, 3742, 3780, 5613, 5670, 7484, 9355, 11226, 11340, 13097, 16839, 18710, 22452, 26194, 28065, 33678, 37420, 39291, 50517, 52388, 56130, 65485, 67356, 78582, 84195, 101034, 112260, 117873, 130970, 151551, 157164, 168390, 196455, 202068, 235746, 252585, 261940, 303102, 336780, 353619, 392910, 471492, 505170, 589365, 606204, 707238, 757755, 785820, 1010340, 1060857, 1178730, 1414476, 1515510, 1768095, 2121714, 2357460, 3031020, 3536190, 4243428, 5304285, 7072380, 10608570, 21217140]

約数ペア:

[(1, 21217140), (2, 10608570), (3, 7072380), (4, 5304285), (5, 4243428), (6, 3536190), (7, 3031020), (9, 2357460), (10, 2121714), (12, 1768095), (14, 1515510), (15, 1414476), (18, 1178730), (20, 1060857), (21, 1010340), (27, 785820), (28, 757755), (30, 707238), (35, 606204), (36, 589365), (42, 505170), (45, 471492), (54, 392910), (60, 353619), (63, 336780), (70, 303102), (81, 261940), (84, 252585), (90, 235746), (105, 202068), (108, 196455), (126, 168390), (135, 157164), (140, 151551), (162, 130970), (180, 117873), (189, 112260), (210, 101034), (252, 84195), (270, 78582), (315, 67356), (324, 65485), (378, 56130), (405, 52388), (420, 50517), (540, 39291), (567, 37420), (630, 33678), (756, 28065), (810, 26194), (945, 22452), (1134, 18710), (1260, 16839), (1620, 13097), (1871, 11340), (1890, 11226), (2268, 9355), (2835, 7484), (3742, 5670), (3780, 5613)]