21396508

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1087}}^1$

素因数の和:1154

約数の個数: 48

約数和(自身を含む): 46305280

約数和(自身を除く): 24908772

約数列:

[1, 2, 4, 7, 14, 19, 28, 37, 38, 74, 76, 133, 148, 259, 266, 518, 532, 703, 1036, 1087, 1406, 2174, 2812, 4348, 4921, 7609, 9842, 15218, 19684, 20653, 30436, 40219, 41306, 80438, 82612, 144571, 160876, 281533, 289142, 563066, 578284, 764161, 1126132, 1528322, 3056644, 5349127, 10698254, 21396508]

約数ペア:

[(1, 21396508), (2, 10698254), (4, 5349127), (7, 3056644), (14, 1528322), (19, 1126132), (28, 764161), (37, 578284), (38, 563066), (74, 289142), (76, 281533), (133, 160876), (148, 144571), (259, 82612), (266, 80438), (518, 41306), (532, 40219), (703, 30436), (1036, 20653), (1087, 19684), (1406, 15218), (2174, 9842), (2812, 7609), (4348, 4921)]