19172840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 45048960

約数和(自身を除く): 25876120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 71, 86, 142, 157, 172, 215, 284, 314, 344, 355, 430, 568, 628, 710, 785, 860, 1256, 1420, 1570, 1720, 2840, 3053, 3140, 6106, 6280, 6751, 11147, 12212, 13502, 15265, 22294, 24424, 27004, 30530, 33755, 44588, 54008, 55735, 61060, 67510, 89176, 111470, 122120, 135020, 222940, 270040, 445880, 479321, 958642, 1917284, 2396605, 3834568, 4793210, 9586420, 19172840]

約数ペア:

[(1, 19172840), (2, 9586420), (4, 4793210), (5, 3834568), (8, 2396605), (10, 1917284), (20, 958642), (40, 479321), (43, 445880), (71, 270040), (86, 222940), (142, 135020), (157, 122120), (172, 111470), (215, 89176), (284, 67510), (314, 61060), (344, 55735), (355, 54008), (430, 44588), (568, 33755), (628, 30530), (710, 27004), (785, 24424), (860, 22294), (1256, 15265), (1420, 13502), (1570, 12212), (1720, 11147), (2840, 6751), (3053, 6280), (3140, 6106)]