199919240

素因数分解:

$2^3\times 5^1\times {\mathrm{4997981}}^1$

素因数の和:4997992

約数の個数: 16

約数和(自身を含む): 449818380

約数和(自身を除く): 249899140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4997981, 9995962, 19991924, 24989905, 39983848, 49979810, 99959620, 199919240]

約数ペア:

[(1, 199919240), (2, 99959620), (4, 49979810), (5, 39983848), (8, 24989905), (10, 19991924), (20, 9995962), (40, 4997981)]