20382640

素因数分解:

$2^4\times 5^1\times {\mathrm{254783}}^1$

素因数の和:254796

約数の個数: 20

約数和(自身を含む): 47389824

約数和(自身を除く): 27007184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254783, 509566, 1019132, 1273915, 2038264, 2547830, 4076528, 5095660, 10191320, 20382640]

約数ペア:

[(1, 20382640), (2, 10191320), (4, 5095660), (5, 4076528), (8, 2547830), (10, 2038264), (16, 1273915), (20, 1019132), (40, 509566), (80, 254783)]