20051920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{587}}^1$

素因数の和:668

約数の個数: 80

約数和(自身を含む): 54246528

約数和(自身を除く): 34194608

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 560, 587, 610, 854, 976, 1174, 1220, 1708, 2135, 2348, 2440, 2935, 3416, 4109, 4270, 4696, 4880, 5870, 6832, 8218, 8540, 9392, 11740, 16436, 17080, 20545, 23480, 32872, 34160, 35807, 41090, 46960, 65744, 71614, 82180, 143228, 164360, 179035, 250649, 286456, 328720, 358070, 501298, 572912, 716140, 1002596, 1253245, 1432280, 2005192, 2506490, 2864560, 4010384, 5012980, 10025960, 20051920]

約数ペア:

[(1, 20051920), (2, 10025960), (4, 5012980), (5, 4010384), (7, 2864560), (8, 2506490), (10, 2005192), (14, 1432280), (16, 1253245), (20, 1002596), (28, 716140), (35, 572912), (40, 501298), (56, 358070), (61, 328720), (70, 286456), (80, 250649), (112, 179035), (122, 164360), (140, 143228), (244, 82180), (280, 71614), (305, 65744), (427, 46960), (488, 41090), (560, 35807), (587, 34160), (610, 32872), (854, 23480), (976, 20545), (1174, 17080), (1220, 16436), (1708, 11740), (2135, 9392), (2348, 8540), (2440, 8218), (2935, 6832), (3416, 5870), (4109, 4880), (4270, 4696)]