20587880

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^2\times {\mathrm{233}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 47532420

約数和(自身を除く): 26944540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 233, 235, 376, 466, 470, 932, 940, 1165, 1864, 1880, 2209, 2330, 4418, 4660, 8836, 9320, 10951, 11045, 17672, 21902, 22090, 43804, 44180, 54755, 87608, 88360, 109510, 219020, 438040, 514697, 1029394, 2058788, 2573485, 4117576, 5146970, 10293940, 20587880]

約数ペア:

[(1, 20587880), (2, 10293940), (4, 5146970), (5, 4117576), (8, 2573485), (10, 2058788), (20, 1029394), (40, 514697), (47, 438040), (94, 219020), (188, 109510), (233, 88360), (235, 87608), (376, 54755), (466, 44180), (470, 43804), (932, 22090), (940, 21902), (1165, 17672), (1864, 11045), (1880, 10951), (2209, 9320), (2330, 8836), (4418, 4660)]