82808080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{347}}^1$

素因数の和:536

約数の個数: 80

約数和(自身を含む): 204540480

約数和(自身を除く): 121732400

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 157, 190, 304, 314, 347, 380, 628, 694, 760, 785, 1256, 1388, 1520, 1570, 1735, 2512, 2776, 2983, 3140, 3470, 5552, 5966, 6280, 6593, 6940, 11932, 12560, 13186, 13880, 14915, 23864, 26372, 27760, 29830, 32965, 47728, 52744, 54479, 59660, 65930, 105488, 108958, 119320, 131860, 217916, 238640, 263720, 272395, 435832, 527440, 544790, 871664, 1035101, 1089580, 2070202, 2179160, 4140404, 4358320, 5175505, 8280808, 10351010, 16561616, 20702020, 41404040, 82808080]

約数ペア:

[(1, 82808080), (2, 41404040), (4, 20702020), (5, 16561616), (8, 10351010), (10, 8280808), (16, 5175505), (19, 4358320), (20, 4140404), (38, 2179160), (40, 2070202), (76, 1089580), (80, 1035101), (95, 871664), (152, 544790), (157, 527440), (190, 435832), (304, 272395), (314, 263720), (347, 238640), (380, 217916), (628, 131860), (694, 119320), (760, 108958), (785, 105488), (1256, 65930), (1388, 59660), (1520, 54479), (1570, 52744), (1735, 47728), (2512, 32965), (2776, 29830), (2983, 27760), (3140, 26372), (3470, 23864), (5552, 14915), (5966, 13880), (6280, 13186), (6593, 12560), (6940, 11932)]