21090984

素因数分解:

$2^3\times 3^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1$

素因数の和:350

約数の個数: 64

約数和(自身を含む): 54743040

約数和(自身を除く): 33652056

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 43, 86, 107, 129, 172, 191, 214, 258, 321, 344, 382, 428, 516, 573, 642, 764, 856, 1032, 1146, 1284, 1528, 2292, 2568, 4584, 4601, 8213, 9202, 13803, 16426, 18404, 20437, 24639, 27606, 32852, 36808, 40874, 49278, 55212, 61311, 65704, 81748, 98556, 110424, 122622, 163496, 197112, 245244, 490488, 878791, 1757582, 2636373, 3515164, 5272746, 7030328, 10545492, 21090984]

約数ペア:

[(1, 21090984), (2, 10545492), (3, 7030328), (4, 5272746), (6, 3515164), (8, 2636373), (12, 1757582), (24, 878791), (43, 490488), (86, 245244), (107, 197112), (129, 163496), (172, 122622), (191, 110424), (214, 98556), (258, 81748), (321, 65704), (344, 61311), (382, 55212), (428, 49278), (516, 40874), (573, 36808), (642, 32852), (764, 27606), (856, 24639), (1032, 20437), (1146, 18404), (1284, 16426), (1528, 13803), (2292, 9202), (2568, 8213), (4584, 4601)]