21709818

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{257}}^1$

素因数の和:316

約数の個数: 72

約数和(自身を含む): 53670708

約数和(自身を除く): 31960890

約数列:

[1, 2, 3, 6, 9, 13, 18, 19, 26, 38, 39, 57, 78, 114, 117, 171, 234, 247, 257, 342, 361, 494, 514, 722, 741, 771, 1083, 1482, 1542, 2166, 2223, 2313, 3249, 3341, 4446, 4626, 4693, 4883, 6498, 6682, 9386, 9766, 10023, 14079, 14649, 20046, 28158, 29298, 30069, 42237, 43947, 60138, 63479, 84474, 87894, 92777, 126958, 185554, 190437, 278331, 380874, 556662, 571311, 834993, 1142622, 1206101, 1669986, 2412202, 3618303, 7236606, 10854909, 21709818]

約数ペア:

[(1, 21709818), (2, 10854909), (3, 7236606), (6, 3618303), (9, 2412202), (13, 1669986), (18, 1206101), (19, 1142622), (26, 834993), (38, 571311), (39, 556662), (57, 380874), (78, 278331), (114, 190437), (117, 185554), (171, 126958), (234, 92777), (247, 87894), (257, 84474), (342, 63479), (361, 60138), (494, 43947), (514, 42237), (722, 30069), (741, 29298), (771, 28158), (1083, 20046), (1482, 14649), (1542, 14079), (2166, 10023), (2223, 9766), (2313, 9386), (3249, 6682), (3341, 6498), (4446, 4883), (4626, 4693)]