20834720

素因数分解:

$2^5\times 5^1\times {\mathrm{197}}^1\times {\mathrm{661}}^1$

素因数の和:873

約数の個数: 48

約数和(自身を含む): 49546728

約数和(自身を除く): 28712008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 197, 394, 661, 788, 985, 1322, 1576, 1970, 2644, 3152, 3305, 3940, 5288, 6304, 6610, 7880, 10576, 13220, 15760, 21152, 26440, 31520, 52880, 105760, 130217, 260434, 520868, 651085, 1041736, 1302170, 2083472, 2604340, 4166944, 5208680, 10417360, 20834720]

約数ペア:

[(1, 20834720), (2, 10417360), (4, 5208680), (5, 4166944), (8, 2604340), (10, 2083472), (16, 1302170), (20, 1041736), (32, 651085), (40, 520868), (80, 260434), (160, 130217), (197, 105760), (394, 52880), (661, 31520), (788, 26440), (985, 21152), (1322, 15760), (1576, 13220), (1970, 10576), (2644, 7880), (3152, 6610), (3305, 6304), (3940, 5288)]