20646840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{349}}^1$

素因数の和:409

約数の個数: 128

約数和(自身を含む): 68040000

約数和(自身を除く): 47393160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 29, 30, 34, 40, 51, 58, 60, 68, 85, 87, 102, 116, 120, 136, 145, 170, 174, 204, 232, 255, 290, 340, 348, 349, 408, 435, 493, 510, 580, 680, 696, 698, 870, 986, 1020, 1047, 1160, 1396, 1479, 1740, 1745, 1972, 2040, 2094, 2465, 2792, 2958, 3480, 3490, 3944, 4188, 4930, 5235, 5916, 5933, 6980, 7395, 8376, 9860, 10121, 10470, 11832, 11866, 13960, 14790, 17799, 19720, 20242, 20940, 23732, 29580, 29665, 30363, 35598, 40484, 41880, 47464, 50605, 59160, 59330, 60726, 71196, 80968, 88995, 101210, 118660, 121452, 142392, 151815, 172057, 177990, 202420, 237320, 242904, 303630, 344114, 355980, 404840, 516171, 607260, 688228, 711960, 860285, 1032342, 1214520, 1376456, 1720570, 2064684, 2580855, 3441140, 4129368, 5161710, 6882280, 10323420, 20646840]

約数ペア:

[(1, 20646840), (2, 10323420), (3, 6882280), (4, 5161710), (5, 4129368), (6, 3441140), (8, 2580855), (10, 2064684), (12, 1720570), (15, 1376456), (17, 1214520), (20, 1032342), (24, 860285), (29, 711960), (30, 688228), (34, 607260), (40, 516171), (51, 404840), (58, 355980), (60, 344114), (68, 303630), (85, 242904), (87, 237320), (102, 202420), (116, 177990), (120, 172057), (136, 151815), (145, 142392), (170, 121452), (174, 118660), (204, 101210), (232, 88995), (255, 80968), (290, 71196), (340, 60726), (348, 59330), (349, 59160), (408, 50605), (435, 47464), (493, 41880), (510, 40484), (580, 35598), (680, 30363), (696, 29665), (698, 29580), (870, 23732), (986, 20940), (1020, 20242), (1047, 19720), (1160, 17799), (1396, 14790), (1479, 13960), (1740, 11866), (1745, 11832), (1972, 10470), (2040, 10121), (2094, 9860), (2465, 8376), (2792, 7395), (2958, 6980), (3480, 5933), (3490, 5916), (3944, 5235), (4188, 4930)]