81971840

素因数分解:

$2^7\times 5^1\times {\mathrm{263}}^1\times {\mathrm{487}}^1$

素因数の和:769

約数の個数: 64

約数和(自身を含む): 197112960

約数和(自身を除く): 115141120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 263, 320, 487, 526, 640, 974, 1052, 1315, 1948, 2104, 2435, 2630, 3896, 4208, 4870, 5260, 7792, 8416, 9740, 10520, 15584, 16832, 19480, 21040, 31168, 33664, 38960, 42080, 62336, 77920, 84160, 128081, 155840, 168320, 256162, 311680, 512324, 640405, 1024648, 1280810, 2049296, 2561620, 4098592, 5123240, 8197184, 10246480, 16394368, 20492960, 40985920, 81971840]

約数ペア:

[(1, 81971840), (2, 40985920), (4, 20492960), (5, 16394368), (8, 10246480), (10, 8197184), (16, 5123240), (20, 4098592), (32, 2561620), (40, 2049296), (64, 1280810), (80, 1024648), (128, 640405), (160, 512324), (263, 311680), (320, 256162), (487, 168320), (526, 155840), (640, 128081), (974, 84160), (1052, 77920), (1315, 62336), (1948, 42080), (2104, 38960), (2435, 33664), (2630, 31168), (3896, 21040), (4208, 19480), (4870, 16832), (5260, 15584), (7792, 10520), (8416, 9740)]