28987940

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{4153}}^1$

素因数の和:4511

約数の個数: 24

約数和(自身を含む): 61063800

約数和(自身を除く): 32075860

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1396, 1745, 3490, 4153, 6980, 8306, 16612, 20765, 41530, 83060, 1449397, 2898794, 5797588, 7246985, 14493970, 28987940]

約数ペア:

[(1, 28987940), (2, 14493970), (4, 7246985), (5, 5797588), (10, 2898794), (20, 1449397), (349, 83060), (698, 41530), (1396, 20765), (1745, 16612), (3490, 8306), (4153, 6980)]