20001320

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10639}}^1$

素因数の和:10697

約数の個数: 32

約数和(自身を含む): 45964800

約数和(自身を除く): 25963480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 10639, 21278, 42556, 53195, 85112, 106390, 212780, 425560, 500033, 1000066, 2000132, 2500165, 4000264, 5000330, 10000660, 20001320]

約数ペア:

[(1, 20001320), (2, 10000660), (4, 5000330), (5, 4000264), (8, 2500165), (10, 2000132), (20, 1000066), (40, 500033), (47, 425560), (94, 212780), (188, 106390), (235, 85112), (376, 53195), (470, 42556), (940, 21278), (1880, 10639)]