64140520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{419}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 149688000

約数和(自身を除く): 85547480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 89, 172, 178, 215, 344, 356, 419, 430, 445, 712, 838, 860, 890, 1676, 1720, 1780, 2095, 3352, 3560, 3827, 4190, 7654, 8380, 15308, 16760, 18017, 19135, 30616, 36034, 37291, 38270, 72068, 74582, 76540, 90085, 144136, 149164, 153080, 180170, 186455, 298328, 360340, 372910, 720680, 745820, 1491640, 1603513, 3207026, 6414052, 8017565, 12828104, 16035130, 32070260, 64140520]

約数ペア:

[(1, 64140520), (2, 32070260), (4, 16035130), (5, 12828104), (8, 8017565), (10, 6414052), (20, 3207026), (40, 1603513), (43, 1491640), (86, 745820), (89, 720680), (172, 372910), (178, 360340), (215, 298328), (344, 186455), (356, 180170), (419, 153080), (430, 149164), (445, 144136), (712, 90085), (838, 76540), (860, 74582), (890, 72068), (1676, 38270), (1720, 37291), (1780, 36034), (2095, 30616), (3352, 19135), (3560, 18017), (3827, 16760), (4190, 15308), (7654, 8380)]