1291288280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{750749}}^1$

素因数の和:750803

約数の個数: 32

約数和(自身を含む): 2972970000

約数和(自身を除く): 1681681720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 750749, 1501498, 3002996, 3753745, 6005992, 7507490, 15014980, 30029960, 32282207, 64564414, 129128828, 161411035, 258257656, 322822070, 645644140, 1291288280]

約数ペア:

[(1, 1291288280), (2, 645644140), (4, 322822070), (5, 258257656), (8, 161411035), (10, 129128828), (20, 64564414), (40, 32282207), (43, 30029960), (86, 15014980), (172, 7507490), (215, 6005992), (344, 3753745), (430, 3002996), (860, 1501498), (1720, 750749)]