28257680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{197}}^1$

素因数の和:384

約数の個数: 80

約数和(自身を含む): 72477504

約数和(自身を除く): 44219824

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 163, 176, 197, 220, 326, 394, 440, 652, 788, 815, 880, 985, 1304, 1576, 1630, 1793, 1970, 2167, 2608, 3152, 3260, 3586, 3940, 4334, 6520, 7172, 7880, 8668, 8965, 10835, 13040, 14344, 15760, 17336, 17930, 21670, 28688, 32111, 34672, 35860, 43340, 64222, 71720, 86680, 128444, 143440, 160555, 173360, 256888, 321110, 353221, 513776, 642220, 706442, 1284440, 1412884, 1766105, 2568880, 2825768, 3532210, 5651536, 7064420, 14128840, 28257680]

約数ペア:

[(1, 28257680), (2, 14128840), (4, 7064420), (5, 5651536), (8, 3532210), (10, 2825768), (11, 2568880), (16, 1766105), (20, 1412884), (22, 1284440), (40, 706442), (44, 642220), (55, 513776), (80, 353221), (88, 321110), (110, 256888), (163, 173360), (176, 160555), (197, 143440), (220, 128444), (326, 86680), (394, 71720), (440, 64222), (652, 43340), (788, 35860), (815, 34672), (880, 32111), (985, 28688), (1304, 21670), (1576, 17930), (1630, 17336), (1793, 15760), (1970, 14344), (2167, 13040), (2608, 10835), (3152, 8965), (3260, 8668), (3586, 7880), (3940, 7172), (4334, 6520)]