1388404820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{67}}^1\times {\mathrm{8563}}^1$

素因数の和:8661

約数の個数: 72

約数和(自身を含む): 3253018272

約数和(自身を除く): 1864613452

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 67, 110, 121, 134, 220, 242, 268, 335, 484, 605, 670, 737, 1210, 1340, 1474, 2420, 2948, 3685, 7370, 8107, 8563, 14740, 16214, 17126, 32428, 34252, 40535, 42815, 81070, 85630, 94193, 162140, 171260, 188386, 376772, 470965, 573721, 941930, 1036123, 1147442, 1883860, 2072246, 2294884, 2868605, 4144492, 5180615, 5737210, 6310931, 10361230, 11474420, 12621862, 20722460, 25243724, 31554655, 63109310, 69420241, 126218620, 138840482, 277680964, 347101205, 694202410, 1388404820]

約数ペア:

[(1, 1388404820), (2, 694202410), (4, 347101205), (5, 277680964), (10, 138840482), (11, 126218620), (20, 69420241), (22, 63109310), (44, 31554655), (55, 25243724), (67, 20722460), (110, 12621862), (121, 11474420), (134, 10361230), (220, 6310931), (242, 5737210), (268, 5180615), (335, 4144492), (484, 2868605), (605, 2294884), (670, 2072246), (737, 1883860), (1210, 1147442), (1340, 1036123), (1474, 941930), (2420, 573721), (2948, 470965), (3685, 376772), (7370, 188386), (8107, 171260), (8563, 162140), (14740, 94193), (16214, 85630), (17126, 81070), (32428, 42815), (34252, 40535)]