81387520

素因数分解:

$2^{13}\times 5^1\times {\mathrm{1987}}^1$

素因数の和:2018

約数の個数: 56

約数和(自身を含む): 195416424

約数和(自身を除く): 114028904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 1987, 2048, 2560, 3974, 4096, 5120, 7948, 8192, 9935, 10240, 15896, 19870, 20480, 31792, 39740, 40960, 63584, 79480, 127168, 158960, 254336, 317920, 508672, 635840, 1017344, 1271680, 2034688, 2543360, 4069376, 5086720, 8138752, 10173440, 16277504, 20346880, 40693760, 81387520]

約数ペア:

[(1, 81387520), (2, 40693760), (4, 20346880), (5, 16277504), (8, 10173440), (10, 8138752), (16, 5086720), (20, 4069376), (32, 2543360), (40, 2034688), (64, 1271680), (80, 1017344), (128, 635840), (160, 508672), (256, 317920), (320, 254336), (512, 158960), (640, 127168), (1024, 79480), (1280, 63584), (1987, 40960), (2048, 39740), (2560, 31792), (3974, 20480), (4096, 19870), (5120, 15896), (7948, 10240), (8192, 9935)]