20789120

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{2953}}^1$

素因数の和:2983

約数の個数: 64

約数和(自身を含む): 54235440

約数和(自身を除く): 33446320

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 320, 352, 440, 640, 704, 880, 1408, 1760, 2953, 3520, 5906, 7040, 11812, 14765, 23624, 29530, 32483, 47248, 59060, 64966, 94496, 118120, 129932, 162415, 188992, 236240, 259864, 324830, 377984, 472480, 519728, 649660, 944960, 1039456, 1299320, 1889920, 2078912, 2598640, 4157824, 5197280, 10394560, 20789120]

約数ペア:

[(1, 20789120), (2, 10394560), (4, 5197280), (5, 4157824), (8, 2598640), (10, 2078912), (11, 1889920), (16, 1299320), (20, 1039456), (22, 944960), (32, 649660), (40, 519728), (44, 472480), (55, 377984), (64, 324830), (80, 259864), (88, 236240), (110, 188992), (128, 162415), (160, 129932), (176, 118120), (220, 94496), (320, 64966), (352, 59060), (440, 47248), (640, 32483), (704, 29530), (880, 23624), (1408, 14765), (1760, 11812), (2953, 7040), (3520, 5906)]