278550440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{421}}^1$

素因数の和:595

約数の個数: 128

約数和(自身を含む): 765676800

約数和(自身を除く): 487126360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 56, 68, 70, 85, 119, 136, 139, 140, 170, 238, 278, 280, 340, 421, 476, 556, 595, 680, 695, 842, 952, 973, 1112, 1190, 1390, 1684, 1946, 2105, 2363, 2380, 2780, 2947, 3368, 3892, 4210, 4726, 4760, 4865, 5560, 5894, 7157, 7784, 8420, 9452, 9730, 11788, 11815, 14314, 14735, 16541, 16840, 18904, 19460, 23576, 23630, 28628, 29470, 33082, 35785, 38920, 47260, 50099, 57256, 58519, 58940, 66164, 71570, 82705, 94520, 100198, 117038, 117880, 132328, 143140, 165410, 200396, 234076, 250495, 286280, 292595, 330820, 400792, 409633, 468152, 500990, 585190, 661640, 819266, 994823, 1001980, 1170380, 1638532, 1989646, 2003960, 2048165, 2340760, 3277064, 3979292, 4096330, 4974115, 6963761, 7958584, 8192660, 9948230, 13927522, 16385320, 19896460, 27855044, 34818805, 39792920, 55710088, 69637610, 139275220, 278550440]

約数ペア:

[(1, 278550440), (2, 139275220), (4, 69637610), (5, 55710088), (7, 39792920), (8, 34818805), (10, 27855044), (14, 19896460), (17, 16385320), (20, 13927522), (28, 9948230), (34, 8192660), (35, 7958584), (40, 6963761), (56, 4974115), (68, 4096330), (70, 3979292), (85, 3277064), (119, 2340760), (136, 2048165), (139, 2003960), (140, 1989646), (170, 1638532), (238, 1170380), (278, 1001980), (280, 994823), (340, 819266), (421, 661640), (476, 585190), (556, 500990), (595, 468152), (680, 409633), (695, 400792), (842, 330820), (952, 292595), (973, 286280), (1112, 250495), (1190, 234076), (1390, 200396), (1684, 165410), (1946, 143140), (2105, 132328), (2363, 117880), (2380, 117038), (2780, 100198), (2947, 94520), (3368, 82705), (3892, 71570), (4210, 66164), (4726, 58940), (4760, 58519), (4865, 57256), (5560, 50099), (5894, 47260), (7157, 38920), (7784, 35785), (8420, 33082), (9452, 29470), (9730, 28628), (11788, 23630), (11815, 23576), (14314, 19460), (14735, 18904), (16541, 16840)]