81939080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47639}}^1$

素因数の和:47693

約数の個数: 32

約数和(自身を含む): 188654400

約数和(自身を除く): 106715320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 47639, 95278, 190556, 238195, 381112, 476390, 952780, 1905560, 2048477, 4096954, 8193908, 10242385, 16387816, 20484770, 40969540, 81939080]

約数ペア:

[(1, 81939080), (2, 40969540), (4, 20484770), (5, 16387816), (8, 10242385), (10, 8193908), (20, 4096954), (40, 2048477), (43, 1905560), (86, 952780), (172, 476390), (215, 381112), (344, 238195), (430, 190556), (860, 95278), (1720, 47639)]