28486780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{719}}^1$

素因数の和:1018

約数の個数: 48

約数和(自身を含む): 68705280

約数和(自身を除く): 40218500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 283, 566, 719, 1132, 1415, 1438, 1981, 2830, 2876, 3595, 3962, 5033, 5660, 7190, 7924, 9905, 10066, 14380, 19810, 20132, 25165, 39620, 50330, 100660, 203477, 406954, 813908, 1017385, 1424339, 2034770, 2848678, 4069540, 5697356, 7121695, 14243390, 28486780]

約数ペア:

[(1, 28486780), (2, 14243390), (4, 7121695), (5, 5697356), (7, 4069540), (10, 2848678), (14, 2034770), (20, 1424339), (28, 1017385), (35, 813908), (70, 406954), (140, 203477), (283, 100660), (566, 50330), (719, 39620), (1132, 25165), (1415, 20132), (1438, 19810), (1981, 14380), (2830, 10066), (2876, 9905), (3595, 7924), (3962, 7190), (5033, 5660)]