21765880

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{2069}}^1$

素因数の和:2343

約数の個数: 32

約数和(自身を含む): 49183200

約数和(自身を除く): 27417320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2069, 2104, 2630, 4138, 5260, 8276, 10345, 10520, 16552, 20690, 41380, 82760, 544147, 1088294, 2176588, 2720735, 4353176, 5441470, 10882940, 21765880]

約数ペア:

[(1, 21765880), (2, 10882940), (4, 5441470), (5, 4353176), (8, 2720735), (10, 2176588), (20, 1088294), (40, 544147), (263, 82760), (526, 41380), (1052, 20690), (1315, 16552), (2069, 10520), (2104, 10345), (2630, 8276), (4138, 5260)]