20050905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1$

素因数の和:318

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19762215

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 47, 51, 85, 105, 119, 141, 235, 239, 255, 329, 357, 595, 705, 717, 799, 987, 1195, 1645, 1673, 1785, 2397, 3585, 3995, 4063, 4935, 5019, 5593, 8365, 11233, 11985, 12189, 16779, 20315, 25095, 27965, 28441, 33699, 56165, 60945, 78631, 83895, 85323, 142205, 168495, 190961, 235893, 393155, 426615, 572883, 954805, 1179465, 1336727, 2864415, 4010181, 6683635, 20050905]

約数ペア:

[(1, 20050905), (3, 6683635), (5, 4010181), (7, 2864415), (15, 1336727), (17, 1179465), (21, 954805), (35, 572883), (47, 426615), (51, 393155), (85, 235893), (105, 190961), (119, 168495), (141, 142205), (235, 85323), (239, 83895), (255, 78631), (329, 60945), (357, 56165), (595, 33699), (705, 28441), (717, 27965), (799, 25095), (987, 20315), (1195, 16779), (1645, 12189), (1673, 11985), (1785, 11233), (2397, 8365), (3585, 5593), (3995, 5019), (4063, 4935)]