8487340

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 18627840

約数和(自身を除く): 10140500

約数列:

[1, 2, 4, 5, 10, 20, 43, 71, 86, 139, 142, 172, 215, 278, 284, 355, 430, 556, 695, 710, 860, 1390, 1420, 2780, 3053, 5977, 6106, 9869, 11954, 12212, 15265, 19738, 23908, 29885, 30530, 39476, 49345, 59770, 61060, 98690, 119540, 197380, 424367, 848734, 1697468, 2121835, 4243670, 8487340]

約数ペア:

[(1, 8487340), (2, 4243670), (4, 2121835), (5, 1697468), (10, 848734), (20, 424367), (43, 197380), (71, 119540), (86, 98690), (139, 61060), (142, 59770), (172, 49345), (215, 39476), (278, 30530), (284, 29885), (355, 23908), (430, 19738), (556, 15265), (695, 12212), (710, 11954), (860, 9869), (1390, 6106), (1420, 5977), (2780, 3053)]