177780920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{2521}}^1$

素因数の和:2616

約数の個数: 64

約数和(自身を含む): 419459040

約数和(自身を除く): 241678120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 43, 82, 86, 164, 172, 205, 215, 328, 344, 410, 430, 820, 860, 1640, 1720, 1763, 2521, 3526, 5042, 7052, 8815, 10084, 12605, 14104, 17630, 20168, 25210, 35260, 50420, 70520, 100840, 103361, 108403, 206722, 216806, 413444, 433612, 516805, 542015, 826888, 867224, 1033610, 1084030, 2067220, 2168060, 4134440, 4336120, 4444523, 8889046, 17778092, 22222615, 35556184, 44445230, 88890460, 177780920]

約数ペア:

[(1, 177780920), (2, 88890460), (4, 44445230), (5, 35556184), (8, 22222615), (10, 17778092), (20, 8889046), (40, 4444523), (41, 4336120), (43, 4134440), (82, 2168060), (86, 2067220), (164, 1084030), (172, 1033610), (205, 867224), (215, 826888), (328, 542015), (344, 516805), (410, 433612), (430, 413444), (820, 216806), (860, 206722), (1640, 108403), (1720, 103361), (1763, 100840), (2521, 70520), (3526, 50420), (5042, 35260), (7052, 25210), (8815, 20168), (10084, 17630), (12605, 14104)]