77917720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{509}}^1$

素因数の和:652

約数の個数: 64

約数和(自身を含む): 181764000

約数和(自身を除く): 103846280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 89, 172, 178, 215, 344, 356, 430, 445, 509, 712, 860, 890, 1018, 1720, 1780, 2036, 2545, 3560, 3827, 4072, 5090, 7654, 10180, 15308, 19135, 20360, 21887, 30616, 38270, 43774, 45301, 76540, 87548, 90602, 109435, 153080, 175096, 181204, 218870, 226505, 362408, 437740, 453010, 875480, 906020, 1812040, 1947943, 3895886, 7791772, 9739715, 15583544, 19479430, 38958860, 77917720]

約数ペア:

[(1, 77917720), (2, 38958860), (4, 19479430), (5, 15583544), (8, 9739715), (10, 7791772), (20, 3895886), (40, 1947943), (43, 1812040), (86, 906020), (89, 875480), (172, 453010), (178, 437740), (215, 362408), (344, 226505), (356, 218870), (430, 181204), (445, 175096), (509, 153080), (712, 109435), (860, 90602), (890, 87548), (1018, 76540), (1720, 45301), (1780, 43774), (2036, 38270), (2545, 30616), (3560, 21887), (3827, 20360), (4072, 19135), (5090, 15308), (7654, 10180)]