31405480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1$

素因数の和:135

約数の個数: 96

約数和(自身を含む): 78645600

約数和(自身を除く): 47240120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 43, 62, 76, 86, 95, 124, 152, 155, 172, 190, 215, 248, 310, 344, 380, 430, 589, 620, 760, 817, 860, 961, 1178, 1240, 1333, 1634, 1720, 1922, 2356, 2666, 2945, 3268, 3844, 4085, 4712, 4805, 5332, 5890, 6536, 6665, 7688, 8170, 9610, 10664, 11780, 13330, 16340, 18259, 19220, 23560, 25327, 26660, 32680, 36518, 38440, 41323, 50654, 53320, 73036, 82646, 91295, 101308, 126635, 146072, 165292, 182590, 202616, 206615, 253270, 330584, 365180, 413230, 506540, 730360, 785137, 826460, 1013080, 1570274, 1652920, 3140548, 3925685, 6281096, 7851370, 15702740, 31405480]

約数ペア:

[(1, 31405480), (2, 15702740), (4, 7851370), (5, 6281096), (8, 3925685), (10, 3140548), (19, 1652920), (20, 1570274), (31, 1013080), (38, 826460), (40, 785137), (43, 730360), (62, 506540), (76, 413230), (86, 365180), (95, 330584), (124, 253270), (152, 206615), (155, 202616), (172, 182590), (190, 165292), (215, 146072), (248, 126635), (310, 101308), (344, 91295), (380, 82646), (430, 73036), (589, 53320), (620, 50654), (760, 41323), (817, 38440), (860, 36518), (961, 32680), (1178, 26660), (1240, 25327), (1333, 23560), (1634, 19220), (1720, 18259), (1922, 16340), (2356, 13330), (2666, 11780), (2945, 10664), (3268, 9610), (3844, 8170), (4085, 7688), (4712, 6665), (4805, 6536), (5332, 5890)]