278987120

素因数分解:

$2^4\times 5^1\times {\mathrm{3487339}}^1$

素因数の和:3487352

約数の個数: 20

約数和(自身を含む): 648645240

約数和(自身を除く): 369658120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3487339, 6974678, 13949356, 17436695, 27898712, 34873390, 55797424, 69746780, 139493560, 278987120]

約数ペア:

[(1, 278987120), (2, 139493560), (4, 69746780), (5, 55797424), (8, 34873390), (10, 27898712), (16, 17436695), (20, 13949356), (40, 6974678), (80, 3487339)]