20085560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{239}}^1$

素因数の和:452

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 29680840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 191, 220, 239, 382, 440, 478, 764, 955, 956, 1195, 1528, 1910, 1912, 2101, 2390, 2629, 3820, 4202, 4780, 5258, 7640, 8404, 9560, 10505, 10516, 13145, 16808, 21010, 21032, 26290, 42020, 45649, 52580, 84040, 91298, 105160, 182596, 228245, 365192, 456490, 502139, 912980, 1004278, 1825960, 2008556, 2510695, 4017112, 5021390, 10042780, 20085560]

約数ペア:

[(1, 20085560), (2, 10042780), (4, 5021390), (5, 4017112), (8, 2510695), (10, 2008556), (11, 1825960), (20, 1004278), (22, 912980), (40, 502139), (44, 456490), (55, 365192), (88, 228245), (110, 182596), (191, 105160), (220, 91298), (239, 84040), (382, 52580), (440, 45649), (478, 42020), (764, 26290), (955, 21032), (956, 21010), (1195, 16808), (1528, 13145), (1910, 10516), (1912, 10505), (2101, 9560), (2390, 8404), (2629, 7640), (3820, 5258), (4202, 4780)]