20991124

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:269

約数の個数: 96

約数和(自身を含む): 51287040

約数和(自身を除く): 30295916

約数列:

[1, 2, 4, 7, 11, 14, 17, 19, 22, 28, 34, 38, 44, 68, 76, 77, 119, 133, 154, 187, 209, 211, 238, 266, 308, 323, 374, 418, 422, 476, 532, 646, 748, 836, 844, 1292, 1309, 1463, 1477, 2261, 2321, 2618, 2926, 2954, 3553, 3587, 4009, 4522, 4642, 5236, 5852, 5908, 7106, 7174, 8018, 9044, 9284, 14212, 14348, 16036, 16247, 24871, 25109, 28063, 32494, 39457, 44099, 49742, 50218, 56126, 64988, 68153, 78914, 88198, 99484, 100436, 112252, 136306, 157828, 176396, 272612, 276199, 308693, 477071, 552398, 617386, 749683, 954142, 1104796, 1234772, 1499366, 1908284, 2998732, 5247781, 10495562, 20991124]

約数ペア:

[(1, 20991124), (2, 10495562), (4, 5247781), (7, 2998732), (11, 1908284), (14, 1499366), (17, 1234772), (19, 1104796), (22, 954142), (28, 749683), (34, 617386), (38, 552398), (44, 477071), (68, 308693), (76, 276199), (77, 272612), (119, 176396), (133, 157828), (154, 136306), (187, 112252), (209, 100436), (211, 99484), (238, 88198), (266, 78914), (308, 68153), (323, 64988), (374, 56126), (418, 50218), (422, 49742), (476, 44099), (532, 39457), (646, 32494), (748, 28063), (836, 25109), (844, 24871), (1292, 16247), (1309, 16036), (1463, 14348), (1477, 14212), (2261, 9284), (2321, 9044), (2618, 8018), (2926, 7174), (2954, 7106), (3553, 5908), (3587, 5852), (4009, 5236), (4522, 4642)]