28118840

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{9901}}^1$

素因数の和:9983

約数の個数: 32

約数和(自身を含む): 64164960

約数和(自身を除く): 36046120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 9901, 19802, 39604, 49505, 79208, 99010, 198020, 396040, 702971, 1405942, 2811884, 3514855, 5623768, 7029710, 14059420, 28118840]

約数ペア:

[(1, 28118840), (2, 14059420), (4, 7029710), (5, 5623768), (8, 3514855), (10, 2811884), (20, 1405942), (40, 702971), (71, 396040), (142, 198020), (284, 99010), (355, 79208), (568, 49505), (710, 39604), (1420, 19802), (2840, 9901)]