81181560

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:341

約数の個数: 128

約数和(自身を含む): 254822400

約数和(自身を除く): 173640840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 60, 62, 93, 120, 124, 139, 155, 157, 186, 248, 278, 310, 314, 372, 417, 465, 471, 556, 620, 628, 695, 744, 785, 834, 930, 942, 1112, 1240, 1256, 1390, 1570, 1668, 1860, 1884, 2085, 2355, 2780, 3140, 3336, 3720, 3768, 4170, 4309, 4710, 4867, 5560, 6280, 8340, 8618, 9420, 9734, 12927, 14601, 16680, 17236, 18840, 19468, 21545, 21823, 24335, 25854, 29202, 34472, 38936, 43090, 43646, 48670, 51708, 58404, 64635, 65469, 73005, 86180, 87292, 97340, 103416, 109115, 116808, 129270, 130938, 146010, 172360, 174584, 194680, 218230, 258540, 261876, 292020, 327345, 436460, 517080, 523752, 584040, 654690, 676513, 872920, 1309380, 1353026, 2029539, 2618760, 2706052, 3382565, 4059078, 5412104, 6765130, 8118156, 10147695, 13530260, 16236312, 20295390, 27060520, 40590780, 81181560]

約数ペア:

[(1, 81181560), (2, 40590780), (3, 27060520), (4, 20295390), (5, 16236312), (6, 13530260), (8, 10147695), (10, 8118156), (12, 6765130), (15, 5412104), (20, 4059078), (24, 3382565), (30, 2706052), (31, 2618760), (40, 2029539), (60, 1353026), (62, 1309380), (93, 872920), (120, 676513), (124, 654690), (139, 584040), (155, 523752), (157, 517080), (186, 436460), (248, 327345), (278, 292020), (310, 261876), (314, 258540), (372, 218230), (417, 194680), (465, 174584), (471, 172360), (556, 146010), (620, 130938), (628, 129270), (695, 116808), (744, 109115), (785, 103416), (834, 97340), (930, 87292), (942, 86180), (1112, 73005), (1240, 65469), (1256, 64635), (1390, 58404), (1570, 51708), (1668, 48670), (1860, 43646), (1884, 43090), (2085, 38936), (2355, 34472), (2780, 29202), (3140, 25854), (3336, 24335), (3720, 21823), (3768, 21545), (4170, 19468), (4309, 18840), (4710, 17236), (4867, 16680), (5560, 14601), (6280, 12927), (8340, 9734), (8618, 9420)]