21091360

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2161}}^1$

素因数の和:2237

約数の個数: 48

約数和(自身を含む): 50668632

約数和(自身を除く): 29577272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2161, 2440, 4322, 4880, 8644, 9760, 10805, 17288, 21610, 34576, 43220, 69152, 86440, 131821, 172880, 263642, 345760, 527284, 659105, 1054568, 1318210, 2109136, 2636420, 4218272, 5272840, 10545680, 21091360]

約数ペア:

[(1, 21091360), (2, 10545680), (4, 5272840), (5, 4218272), (8, 2636420), (10, 2109136), (16, 1318210), (20, 1054568), (32, 659105), (40, 527284), (61, 345760), (80, 263642), (122, 172880), (160, 131821), (244, 86440), (305, 69152), (488, 43220), (610, 34576), (976, 21610), (1220, 17288), (1952, 10805), (2161, 9760), (2440, 8644), (4322, 4880)]