20128784

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:168

約数の個数: 80

約数和(自身を含む): 44997120

約数和(自身を除く): 24868336

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 47, 52, 58, 71, 94, 104, 116, 142, 188, 208, 232, 284, 376, 377, 464, 568, 611, 752, 754, 923, 1136, 1222, 1363, 1508, 1846, 2059, 2444, 2726, 3016, 3337, 3692, 4118, 4888, 5452, 6032, 6674, 7384, 8236, 9776, 10904, 13348, 14768, 16472, 17719, 21808, 26696, 26767, 32944, 35438, 43381, 53392, 53534, 70876, 86762, 96773, 107068, 141752, 173524, 193546, 214136, 283504, 347048, 387092, 428272, 694096, 774184, 1258049, 1548368, 2516098, 5032196, 10064392, 20128784]

約数ペア:

[(1, 20128784), (2, 10064392), (4, 5032196), (8, 2516098), (13, 1548368), (16, 1258049), (26, 774184), (29, 694096), (47, 428272), (52, 387092), (58, 347048), (71, 283504), (94, 214136), (104, 193546), (116, 173524), (142, 141752), (188, 107068), (208, 96773), (232, 86762), (284, 70876), (376, 53534), (377, 53392), (464, 43381), (568, 35438), (611, 32944), (752, 26767), (754, 26696), (923, 21808), (1136, 17719), (1222, 16472), (1363, 14768), (1508, 13348), (1846, 10904), (2059, 9776), (2444, 8236), (2726, 7384), (3016, 6674), (3337, 6032), (3692, 5452), (4118, 4888)]