21477040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:326

約数の個数: 80

約数和(自身を含む): 54559008

約数和(自身を除く): 33081968

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 107, 130, 193, 208, 214, 260, 386, 428, 520, 535, 772, 856, 965, 1040, 1070, 1391, 1544, 1712, 1930, 2140, 2509, 2782, 3088, 3860, 4280, 5018, 5564, 6955, 7720, 8560, 10036, 11128, 12545, 13910, 15440, 20072, 20651, 22256, 25090, 27820, 40144, 41302, 50180, 55640, 82604, 100360, 103255, 111280, 165208, 200720, 206510, 268463, 330416, 413020, 536926, 826040, 1073852, 1342315, 1652080, 2147704, 2684630, 4295408, 5369260, 10738520, 21477040]

約数ペア:

[(1, 21477040), (2, 10738520), (4, 5369260), (5, 4295408), (8, 2684630), (10, 2147704), (13, 1652080), (16, 1342315), (20, 1073852), (26, 826040), (40, 536926), (52, 413020), (65, 330416), (80, 268463), (104, 206510), (107, 200720), (130, 165208), (193, 111280), (208, 103255), (214, 100360), (260, 82604), (386, 55640), (428, 50180), (520, 41302), (535, 40144), (772, 27820), (856, 25090), (965, 22256), (1040, 20651), (1070, 20072), (1391, 15440), (1544, 13910), (1712, 12545), (1930, 11128), (2140, 10036), (2509, 8560), (2782, 7720), (3088, 6955), (3860, 5564), (4280, 5018)]