18956120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 44478720

約数和(自身を除く): 25522600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 103, 107, 172, 206, 214, 215, 344, 412, 428, 430, 515, 535, 824, 856, 860, 1030, 1070, 1720, 2060, 2140, 4120, 4280, 4429, 4601, 8858, 9202, 11021, 17716, 18404, 22042, 22145, 23005, 35432, 36808, 44084, 44290, 46010, 55105, 88168, 88580, 92020, 110210, 177160, 184040, 220420, 440840, 473903, 947806, 1895612, 2369515, 3791224, 4739030, 9478060, 18956120]

約数ペア:

[(1, 18956120), (2, 9478060), (4, 4739030), (5, 3791224), (8, 2369515), (10, 1895612), (20, 947806), (40, 473903), (43, 440840), (86, 220420), (103, 184040), (107, 177160), (172, 110210), (206, 92020), (214, 88580), (215, 88168), (344, 55105), (412, 46010), (428, 44290), (430, 44084), (515, 36808), (535, 35432), (824, 23005), (856, 22145), (860, 22042), (1030, 18404), (1070, 17716), (1720, 11021), (2060, 9202), (2140, 8858), (4120, 4601), (4280, 4429)]