20616540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{257}}^1$

素因数の和:467

約数の個数: 96

約数和(自身を含む): 66576384

約数和(自身を除く): 45959844

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 191, 210, 257, 382, 420, 514, 573, 764, 771, 955, 1028, 1146, 1285, 1337, 1542, 1799, 1910, 2292, 2570, 2674, 2865, 3084, 3598, 3820, 3855, 4011, 5140, 5348, 5397, 5730, 6685, 7196, 7710, 8022, 8995, 10794, 11460, 13370, 15420, 16044, 17990, 20055, 21588, 26740, 26985, 35980, 40110, 49087, 53970, 80220, 98174, 107940, 147261, 196348, 245435, 294522, 343609, 490870, 589044, 687218, 736305, 981740, 1030827, 1374436, 1472610, 1718045, 2061654, 2945220, 3436090, 4123308, 5154135, 6872180, 10308270, 20616540]

約数ペア:

[(1, 20616540), (2, 10308270), (3, 6872180), (4, 5154135), (5, 4123308), (6, 3436090), (7, 2945220), (10, 2061654), (12, 1718045), (14, 1472610), (15, 1374436), (20, 1030827), (21, 981740), (28, 736305), (30, 687218), (35, 589044), (42, 490870), (60, 343609), (70, 294522), (84, 245435), (105, 196348), (140, 147261), (191, 107940), (210, 98174), (257, 80220), (382, 53970), (420, 49087), (514, 40110), (573, 35980), (764, 26985), (771, 26740), (955, 21588), (1028, 20055), (1146, 17990), (1285, 16044), (1337, 15420), (1542, 13370), (1799, 11460), (1910, 10794), (2292, 8995), (2570, 8022), (2674, 7710), (2865, 7196), (3084, 6685), (3598, 5730), (3820, 5397), (3855, 5348), (4011, 5140)]