256934440

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{61}}^1\times {\mathrm{307}}^1$

素因数の和:400

約数の個数: 128

約数和(自身を含む): 687456000

約数和(自身を除く): 430521560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 61, 70, 98, 122, 140, 196, 244, 245, 280, 305, 307, 343, 392, 427, 488, 490, 610, 614, 686, 854, 980, 1220, 1228, 1372, 1535, 1708, 1715, 1960, 2135, 2149, 2440, 2456, 2744, 2989, 3070, 3416, 3430, 4270, 4298, 5978, 6140, 6860, 8540, 8596, 10745, 11956, 12280, 13720, 14945, 15043, 17080, 17192, 18727, 20923, 21490, 23912, 29890, 30086, 37454, 41846, 42980, 59780, 60172, 74908, 75215, 83692, 85960, 93635, 104615, 105301, 119560, 120344, 131089, 149816, 150430, 167384, 187270, 209230, 210602, 262178, 300860, 374540, 418460, 421204, 524356, 526505, 601720, 655445, 749080, 836920, 842408, 917623, 1048712, 1053010, 1310890, 1835246, 2106020, 2621780, 3670492, 4212040, 4588115, 5243560, 6423361, 7340984, 9176230, 12846722, 18352460, 25693444, 32116805, 36704920, 51386888, 64233610, 128467220, 256934440]

約数ペア:

[(1, 256934440), (2, 128467220), (4, 64233610), (5, 51386888), (7, 36704920), (8, 32116805), (10, 25693444), (14, 18352460), (20, 12846722), (28, 9176230), (35, 7340984), (40, 6423361), (49, 5243560), (56, 4588115), (61, 4212040), (70, 3670492), (98, 2621780), (122, 2106020), (140, 1835246), (196, 1310890), (244, 1053010), (245, 1048712), (280, 917623), (305, 842408), (307, 836920), (343, 749080), (392, 655445), (427, 601720), (488, 526505), (490, 524356), (610, 421204), (614, 418460), (686, 374540), (854, 300860), (980, 262178), (1220, 210602), (1228, 209230), (1372, 187270), (1535, 167384), (1708, 150430), (1715, 149816), (1960, 131089), (2135, 120344), (2149, 119560), (2440, 105301), (2456, 104615), (2744, 93635), (2989, 85960), (3070, 83692), (3416, 75215), (3430, 74908), (4270, 60172), (4298, 59780), (5978, 42980), (6140, 41846), (6860, 37454), (8540, 30086), (8596, 29890), (10745, 23912), (11956, 21490), (12280, 20923), (13720, 18727), (14945, 17192), (15043, 17080)]