81351040

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1609}}^1$

素因数の和:1707

約数の個数: 64

約数和(自身を含む): 197064000

約数和(自身を除く): 115712960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 395, 632, 640, 790, 1264, 1580, 1609, 2528, 3160, 3218, 5056, 6320, 6436, 8045, 10112, 12640, 12872, 16090, 25280, 25744, 32180, 50560, 51488, 64360, 102976, 127111, 128720, 205952, 254222, 257440, 508444, 514880, 635555, 1016888, 1029760, 1271110, 2033776, 2542220, 4067552, 5084440, 8135104, 10168880, 16270208, 20337760, 40675520, 81351040]

約数ペア:

[(1, 81351040), (2, 40675520), (4, 20337760), (5, 16270208), (8, 10168880), (10, 8135104), (16, 5084440), (20, 4067552), (32, 2542220), (40, 2033776), (64, 1271110), (79, 1029760), (80, 1016888), (128, 635555), (158, 514880), (160, 508444), (316, 257440), (320, 254222), (395, 205952), (632, 128720), (640, 127111), (790, 102976), (1264, 64360), (1580, 51488), (1609, 50560), (2528, 32180), (3160, 25744), (3218, 25280), (5056, 16090), (6320, 12872), (6436, 12640), (8045, 10112)]