28421180

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{193}}^1\times {\mathrm{199}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 61924800

約数和(自身を除く): 33503620

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 193, 199, 370, 386, 398, 740, 772, 796, 965, 995, 1930, 1990, 3860, 3980, 7141, 7363, 14282, 14726, 28564, 29452, 35705, 36815, 38407, 71410, 73630, 76814, 142820, 147260, 153628, 192035, 384070, 768140, 1421059, 2842118, 5684236, 7105295, 14210590, 28421180]

約数ペア:

[(1, 28421180), (2, 14210590), (4, 7105295), (5, 5684236), (10, 2842118), (20, 1421059), (37, 768140), (74, 384070), (148, 192035), (185, 153628), (193, 147260), (199, 142820), (370, 76814), (386, 73630), (398, 71410), (740, 38407), (772, 36815), (796, 35705), (965, 29452), (995, 28564), (1930, 14726), (1990, 14282), (3860, 7363), (3980, 7141)]