20880580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:221

約数の個数: 96

約数和(自身を含む): 53625600

約数和(自身を除く): 32745020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 37, 58, 70, 74, 116, 139, 140, 145, 148, 185, 203, 259, 278, 290, 370, 406, 518, 556, 580, 695, 740, 812, 973, 1015, 1036, 1073, 1295, 1390, 1946, 2030, 2146, 2590, 2780, 3892, 4031, 4060, 4292, 4865, 5143, 5180, 5365, 7511, 8062, 9730, 10286, 10730, 15022, 16124, 19460, 20155, 20572, 21460, 25715, 28217, 30044, 36001, 37555, 40310, 51430, 56434, 72002, 75110, 80620, 102860, 112868, 141085, 144004, 149147, 150220, 180005, 282170, 298294, 360010, 564340, 596588, 720020, 745735, 1044029, 1491470, 2088058, 2982940, 4176116, 5220145, 10440290, 20880580]

約数ペア:

[(1, 20880580), (2, 10440290), (4, 5220145), (5, 4176116), (7, 2982940), (10, 2088058), (14, 1491470), (20, 1044029), (28, 745735), (29, 720020), (35, 596588), (37, 564340), (58, 360010), (70, 298294), (74, 282170), (116, 180005), (139, 150220), (140, 149147), (145, 144004), (148, 141085), (185, 112868), (203, 102860), (259, 80620), (278, 75110), (290, 72002), (370, 56434), (406, 51430), (518, 40310), (556, 37555), (580, 36001), (695, 30044), (740, 28217), (812, 25715), (973, 21460), (1015, 20572), (1036, 20155), (1073, 19460), (1295, 16124), (1390, 15022), (1946, 10730), (2030, 10286), (2146, 9730), (2590, 8062), (2780, 7511), (3892, 5365), (4031, 5180), (4060, 5143), (4292, 4865)]