19906420

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{293}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 43464960

約数和(自身を除く): 23558540

約数列:

[1, 2, 4, 5, 10, 20, 43, 79, 86, 158, 172, 215, 293, 316, 395, 430, 586, 790, 860, 1172, 1465, 1580, 2930, 3397, 5860, 6794, 12599, 13588, 16985, 23147, 25198, 33970, 46294, 50396, 62995, 67940, 92588, 115735, 125990, 231470, 251980, 462940, 995321, 1990642, 3981284, 4976605, 9953210, 19906420]

約数ペア:

[(1, 19906420), (2, 9953210), (4, 4976605), (5, 3981284), (10, 1990642), (20, 995321), (43, 462940), (79, 251980), (86, 231470), (158, 125990), (172, 115735), (215, 92588), (293, 67940), (316, 62995), (395, 50396), (430, 46294), (586, 33970), (790, 25198), (860, 23147), (1172, 16985), (1465, 13588), (1580, 12599), (2930, 6794), (3397, 5860)]