20925440

素因数分解:

$2^{10}\times 5^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:153

約数の個数: 88

約数和(自身を含む): 51780912

約数和(自身を除く): 30855472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 67, 80, 122, 128, 134, 160, 244, 256, 268, 305, 320, 335, 488, 512, 536, 610, 640, 670, 976, 1024, 1072, 1220, 1280, 1340, 1952, 2144, 2440, 2560, 2680, 3904, 4087, 4288, 4880, 5120, 5360, 7808, 8174, 8576, 9760, 10720, 15616, 16348, 17152, 19520, 20435, 21440, 31232, 32696, 34304, 39040, 40870, 42880, 62464, 65392, 68608, 78080, 81740, 85760, 130784, 156160, 163480, 171520, 261568, 312320, 326960, 343040, 523136, 653920, 1046272, 1307840, 2092544, 2615680, 4185088, 5231360, 10462720, 20925440]

約数ペア:

[(1, 20925440), (2, 10462720), (4, 5231360), (5, 4185088), (8, 2615680), (10, 2092544), (16, 1307840), (20, 1046272), (32, 653920), (40, 523136), (61, 343040), (64, 326960), (67, 312320), (80, 261568), (122, 171520), (128, 163480), (134, 156160), (160, 130784), (244, 85760), (256, 81740), (268, 78080), (305, 68608), (320, 65392), (335, 62464), (488, 42880), (512, 40870), (536, 39040), (610, 34304), (640, 32696), (670, 31232), (976, 21440), (1024, 20435), (1072, 19520), (1220, 17152), (1280, 16348), (1340, 15616), (1952, 10720), (2144, 9760), (2440, 8576), (2560, 8174), (2680, 7808), (3904, 5360), (4087, 5120), (4288, 4880)]