81904970

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{23879}}^1$

素因数の和:23907

約数の個数: 32

約数和(自身を含む): 171936000

約数和(自身を除く): 90031030

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 343, 490, 686, 1715, 3430, 23879, 47758, 119395, 167153, 238790, 334306, 835765, 1170071, 1671530, 2340142, 5850355, 8190497, 11700710, 16380994, 40952485, 81904970]

約数ペア:

[(1, 81904970), (2, 40952485), (5, 16380994), (7, 11700710), (10, 8190497), (14, 5850355), (35, 2340142), (49, 1671530), (70, 1170071), (98, 835765), (245, 334306), (343, 238790), (490, 167153), (686, 119395), (1715, 47758), (3430, 23879)]