21118040

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^2\times {\mathrm{239}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 48751200

約数和(自身を除く): 27633160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 239, 376, 470, 478, 940, 956, 1195, 1880, 1912, 2209, 2390, 4418, 4780, 8836, 9560, 11045, 11233, 17672, 22090, 22466, 44180, 44932, 56165, 88360, 89864, 112330, 224660, 449320, 527951, 1055902, 2111804, 2639755, 4223608, 5279510, 10559020, 21118040]

約数ペア:

[(1, 21118040), (2, 10559020), (4, 5279510), (5, 4223608), (8, 2639755), (10, 2111804), (20, 1055902), (40, 527951), (47, 449320), (94, 224660), (188, 112330), (235, 89864), (239, 88360), (376, 56165), (470, 44932), (478, 44180), (940, 22466), (956, 22090), (1195, 17672), (1880, 11233), (1912, 11045), (2209, 9560), (2390, 8836), (4418, 4780)]