20512686890

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{4001}}^1\times {\mathrm{11923}}^1$

素因数の和:15974

約数の個数: 32

約数和(自身を含む): 37794119616

約数和(自身を除く): 17281432726

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 4001, 8002, 11923, 20005, 23846, 40010, 59615, 119230, 172043, 344086, 512689, 860215, 1025378, 1720430, 2563445, 5126890, 47703923, 95407846, 238519615, 477039230, 2051268689, 4102537378, 10256343445, 20512686890]

約数ペア:

[(1, 20512686890), (2, 10256343445), (5, 4102537378), (10, 2051268689), (43, 477039230), (86, 238519615), (215, 95407846), (430, 47703923), (4001, 5126890), (8002, 2563445), (11923, 1720430), (20005, 1025378), (23846, 860215), (40010, 512689), (59615, 344086), (119230, 172043)]